CVE-2023-5631 (GCVE-0-2023-5631)
Vulnerability from cvelistv5 – Published: 2023-10-18 14:51 – Updated: 2025-10-21 23:05Title
Stored XSS vulnerability in Roundcube
Summary
Roundcube before 1.4.15, 1.5.x before 1.5.5, and 1.6.x before 1.6.4 allows stored XSS via an HTML e-mail message with a crafted SVG document because of program/lib/Roundcube/rcube_washtml.php behavior. This could allow a remote attacker
to load arbitrary JavaScript code.
Severity
6.1 (Medium)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-11-15 16:39 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
16 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Roundcube | Roundcubemail |
Affected:
1.6.0 , < 1.6.3
(semver)
Affected: 1.5.0 , < 1.5.4 (semver) Affected: 1.4.0 , < 1.5.14 (semver) Unaffected: 1.6.4 Unaffected: 1.5.5 Unaffected: 1.5.15 |
guessed |
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 27269dd8-2616-4f5a-acda-a915460a9e1e
Exploited: Yes
Timestamps
First Seen: 2023-10-26
Asserted: 2023-10-26
Scope
Notes: KEV entry: Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability | Affected: Roundcube / Webmail | Description: Roundcube Webmail contains a persistent cross-site scripting (XSS) vulnerability that allows a remote attacker to run malicious JavaScript code. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2023-11-16 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://roundcube.net/news/2023/10/16/security-update-1.6.4-released, https://roundcube.net/news/2023/10/16/security-updates-1.5.5-and-1.4.15 ; https://nvd.nist.gov/vuln/detail/CVE-2023-5631
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-79 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Webmail |
| Due Date | 2023-11-16 |
| Date Added | 2023-10-26 |
| Vendorproject | Roundcube |
| Vulnerabilityname | Roundcube Webmail Persistent Cross-Site Scripting (XSS) Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-02-02 13:24 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 719139fa-222a-499f-ad94-3ad84910b2b7
Exploited: Yes
Timestamps
First Seen: 2023-10-26
Asserted: 2023-10-26
Scope
Notes: KEVIntel entry: Stored XSS vulnerability in Roundcube | Affected: Roundcube / Roundcubemail | CVSS: 6.1 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | Stored XSS vulnerability in Roundcube |
| Vendor | Roundcube |
| Product | Roundcubemail |
| Added Date | 2023-10-26T00:00:00.000Z |
| Cvss Score | 6.1 |
| Epss Score | None |
| Cvss Severity | MEDIUM |
| Epss Percentile | None |
| Used In Malware | unknown |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-23 11:14 UTC
| Updated: 2026-06-23 11:14 UTC
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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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