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ALSA-2025:7507
Vulnerability from osv_almalinux – Published: 2025-05-13 00:00 – Updated: 2025-07-02 12:26 – Source website
VLAI
Summary
Important: thunderbird security update
Details
Mozilla Thunderbird is a standalone mail and newsgroup client.
Security Fix(es):
- thunderbird: User Interface (UI) Misrepresentation of attachment URL (CVE-2025-3523)
- thunderbird: Information Disclosure of /tmp directory listing (CVE-2025-2830)
- thunderbird: Leak of hashed Window credentials via crafted attachment URL (CVE-2025-3522)
- firefox: thunderbird: Privilege escalation in Firefox Updater (CVE-2025-2817)
- firefox: thunderbird: Unsafe attribute access during XPath parsing (CVE-2025-4087)
- firefox: thunderbird: Process isolation bypass using "javascript:" URI links in cross-origin frames (CVE-2025-4083)
- firefox: thunderbird: Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10 (CVE-2025-4091)
- firefox: thunderbird: Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10 (CVE-2025-4093)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "thunderbird"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "128.10.0-1.el10_0.alma.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"details": "Mozilla Thunderbird is a standalone mail and newsgroup client. \n\nSecurity Fix(es): \n\n * thunderbird: User Interface (UI) Misrepresentation of attachment URL (CVE-2025-3523)\n * thunderbird: Information Disclosure of /tmp directory listing (CVE-2025-2830)\n * thunderbird: Leak of hashed Window credentials via crafted attachment URL (CVE-2025-3522)\n * firefox: thunderbird: Privilege escalation in Firefox Updater (CVE-2025-2817)\n * firefox: thunderbird: Unsafe attribute access during XPath parsing (CVE-2025-4087)\n * firefox: thunderbird: Process isolation bypass using \"javascript:\" URI links in cross-origin frames (CVE-2025-4083)\n * firefox: thunderbird: Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10 (CVE-2025-4091)\n * firefox: thunderbird: Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10 (CVE-2025-4093)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2025:7507",
"modified": "2025-07-02T12:26:26Z",
"published": "2025-05-13T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2025:7507"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-2817"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-2830"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-3522"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-3523"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-4083"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-4087"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-4091"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-4093"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2359786"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2359789"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2359793"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2362902"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2362904"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2362907"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2362912"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2362915"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/10/ALSA-2025-7507.html"
}
],
"related": [
"CVE-2025-3523",
"CVE-2025-2830",
"CVE-2025-3522",
"CVE-2025-2817",
"CVE-2025-4087",
"CVE-2025-4083",
"CVE-2025-4091",
"CVE-2025-4093"
],
"summary": "Important: thunderbird security update"
}
CVE-2025-2817 (GCVE-0-2025-2817)
Vulnerability from cvelistv5 – Published: 2025-04-29 13:13 – Updated: 2026-04-13 14:27
VLAI
EPSS
VEX
Title
Privilege escalation in Thunderbird Updater
Summary
Thunderbird's update mechanism allowed a medium-integrity user process to interfere with the SYSTEM-level updater by manipulating the file-locking behavior. By injecting code into the user-privileged process, an attacker could bypass intended access controls, allowing SYSTEM-level file operations on paths controlled by a non-privileged user and enabling privilege escalation. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-30 03:56 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1917536 | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.23 , ≤ 115.*
(rpm)
Unaffected: 128.10 , ≤ 128.* (rpm) Unaffected: 138 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
128.10 , ≤ 128.*
(rpm)
Unaffected: 138 , ≤ * (rpm) |
Credits
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CVE-2025-2830 (GCVE-0-2025-2830)
Vulnerability from cvelistv5 – Published: 2025-04-15 15:06 – Updated: 2026-04-13 14:28
VLAI
EPSS
VEX
Title
Information Disclosure of /tmp directory listing
Summary
By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into including a directory listing of /tmp when the message is forwarded or edited as a new message. This vulnerability could allow attackers to disclose sensitive information from the victim's system. This vulnerability is not limited to Linux; similar behavior has been observed on Windows as well. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-15 17:53 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
128.9.2 , ≤ 128.*
(rpm)
Unaffected: 137.0.2 , ≤ * (rpm) |
Credits
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CVE-2025-3522 (GCVE-0-2025-3522)
Vulnerability from cvelistv5 – Published: 2025-04-15 15:06 – Updated: 2026-04-13 14:28
VLAI
EPSS
VEX
Title
Leak of hashed Window credentials via crafted attachment URL
Summary
Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validated or sanitized, it can reference internal resources like chrome:// or SMB share file:// links, potentially leading to hashed Windows credential leakage and opening the door to more serious security issues. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-15 18:49 UTC
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
128.9.2 , ≤ 128.*
(rpm)
Unaffected: 137.0.2 , ≤ * (rpm) |
Credits
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],
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},
{
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}
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"title": "Leak of hashed Window credentials via crafted attachment URL"
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CVE-2025-3523 (GCVE-0-2025-3523)
Vulnerability from cvelistv5 – Published: 2025-04-15 15:06 – Updated: 2026-04-13 14:28
VLAI
EPSS
VEX
Title
User Interface (UI) Misrepresentation of attachment URL
Summary
When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick users into downloading content from untrusted sources. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-15 17:45 UTC
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Thunderbird |
Unaffected:
128.9.2 , ≤ 128.*
(rpm)
Unaffected: 137.0.2 , ≤ * (rpm) |
Credits
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CVE-2025-4083 (GCVE-0-2025-4083)
Vulnerability from cvelistv5 – Published: 2025-04-29 13:13 – Updated: 2026-07-25 01:15
VLAI
EPSS
VEX
Title
Process isolation bypass using "javascript:" URI links in cross-origin frames
Summary
A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-30 13:43 UTC
CWE
- CWE-653 - Improper Isolation or Compartmentalization
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1958350 | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.23 , ≤ 115.*
(rpm)
Unaffected: 128.10 , ≤ 128.* (rpm) Unaffected: 138 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
128.10 , ≤ 128.*
(rpm)
Unaffected: 138 , ≤ * (rpm) |
Credits
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CVE-2025-4087 (GCVE-0-2025-4087)
Vulnerability from cvelistv5 – Published: 2025-04-29 13:13 – Updated: 2026-04-13 14:27
VLAI
EPSS
VEX
Title
Unsafe attribute access during XPath parsing
Summary
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
Severity
4.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-29 15:51 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1952465 | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
128.10 , ≤ 128.*
(rpm)
Unaffected: 138 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
128.10 , ≤ 128.*
(rpm)
Unaffected: 138 , ≤ * (rpm) |
Credits
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CVE-2025-4091 (GCVE-0-2025-4091)
Vulnerability from cvelistv5 – Published: 2025-04-29 13:13 – Updated: 2026-04-13 14:27
VLAI
EPSS
VEX
Title
Memory safety bugs fixed in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10
Summary
Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-29 15:36 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://bugzilla.mozilla.org/buglist.cgi?bug_id=1… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://www.mozilla.org/security/advisories/mfsa2… | |
| https://lists.debian.org/debian-lts-announce/2025… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
128.10 , ≤ 128.*
(rpm)
Unaffected: 138 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
128.10 , ≤ 128.*
(rpm)
Unaffected: 138 , ≤ * (rpm) |
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}
CVE-2025-4093 (GCVE-0-2025-4093)
Vulnerability from cvelistv5 – Published: 2025-04-29 13:13 – Updated: 2026-04-13 14:27
VLAI
EPSS
VEX
Title
Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10
Summary
Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-29 15:16 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
128.10 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
128.10 , ≤ *
(rpm)
|
Credits
{
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"providerMetadata": {
"dateUpdated": "2025-09-22T17:45:06.758Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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{
"providerMetadata": {
"dateUpdated": "2025-11-03T19:58:54.629Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"references": [
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html"
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],
"cna": {
"affected": [
{
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"vendor": "Mozilla",
"versions": [
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"status": "unaffected",
"version": "128.10",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
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"status": "unaffected",
"version": "128.10",
"versionType": "rpm"
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],
"value": "Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.10 and Thunderbird 128.10."
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],
"providerMetadata": {
"dateUpdated": "2026-04-13T14:27:25.816Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
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"references": [
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"name": "Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1894100"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2025-29/"
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{
"url": "https://www.mozilla.org/security/advisories/mfsa2025-32/"
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"title": "Memory safety bug fixed in Firefox ESR 128.10 and Thunderbird 128.10"
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"datePublished": "2025-04-29T13:13:50.917Z",
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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