GCVE-1988-2026-0227
Vulnerability from gna-1988 – Published: 2026-09-08 07:57 – Updated: 2026-09-08 07:57
VLAI
EPSS
VEX
Title
[REVIVE-SA-2026-001] Revive Adserver Vulnerabilities
Summary
========================================================================
Revive Adserver Security Advisory REVIVE-SA-2026-001
------------------------------------------------------------------------
https://www.revive-adserver.com/security/revive-sa-2026-001
------------------------------------------------------------------------
Date: 2026-01-14
Risk Level: High
Applications affected: Revive Adserver
Versions affected: <= 6.0.4
Versions not affected: >= 6.0.5
Website: https://www.revive-adserver.com/
========================================================================
========================================================================
Vulnerability 1: Format string injection
========================================================================
Vulnerability Type: Use of Externally-Controlled Format String
[CWE-134]
CVE-ID: CVE-2026-21640
Risk level: Low
CVSS Base Score: 2.7
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
========================================================================
Description
-----------
Details
-------
References
----------
https://hackerone.com/reports/3445332
https://github.com/revive-adserver/revive-adserver/commit/c40187d8
https://cwe.mitre.org/data/definitions/134.html
========================================================================
Vulnerability 2: Authorization Bypass
========================================================================
Vulnerability Type: Authorization Bypass Through User-Controlled Key
[CWE-639]
CVE-ID: CVE-2026-21641
Risk level: High
CVSS Base Score: 7.1
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
========================================================================
Description
-----------
Details
-------
References
----------
https://hackerone.com/reports/3445710
https://github.com/revive-adserver/revive-adserver/commit/f6059335
https://cwe.mitre.org/data/definitions/639.html
========================================================================
Vulnerability 3: Reflected XSS
========================================================================
Vulnerability Type: Improper Neutralization of Input During Web Page
Generation (‘Cross-site Scripting’) [CWE-79]
CVE-ID: CVE-2026-21642
Risk level: Medium
CVSS Base Score: 6.1
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
========================================================================
Description
-----------
Details
-------
References
----------
https://hackerone.com/reports/3470970
https://github.com/revive-adserver/revive-adserver/commit/e245a88
https://github.com/revive-adserver/revive-adserver/commit/0ebc96d
https://cwe.mitre.org/data/definitions/79.html
========================================================================
Vulnerability 4: Reflected XSS
========================================================================
Vulnerability Type: Improper Neutralization of Input During Web Page
Generation (‘Cross-site Scripting’) [CWE-79]
CVE-ID: CVE-2026-21663
Risk level: Medium
CVSS Base Score: 6.1
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
========================================================================
Description
-----------
Details
-------
References
----------
https://hackerone.com/reports/3473696
https://github.com/revive-adserver/revive-adserver/commit/c130eb0
https://cwe.mitre.org/data/definitions/79.html
========================================================================
Vulnerability 5: Reflected XSS
========================================================================
Vulnerability Type: Improper Neutralization of Input During Web Page
Generation (‘Cross-site Scripting’) [CWE-79]
CVE-ID: CVE-2026-21664
Risk level: Medium
CVSS Base Score: 6.1
CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
========================================================================
Description
-----------
Details
-------
References
----------
https://hackerone.com/reports/3468169
https://github.com/revive-adserver/revive-adserver/commit/e88e9ed
https://github.com/revive-adserver/revive-adserver/commit/7a99f69
https://cwe.mitre.org/data/definitions/79.html
========================================================================
Solution
========================================================================
========================================================================
Contact Information
========================================================================
The security contact for Revive Adserver can be reached at:
<security AT revive-adserver DOT com>.
--
Matteo Beccati
On behalf of the Revive Adserver Team
https://www.revive-adserver.com/
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
21 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| unknown | Revive Adserver Vulnerabilities |
Affected:
unknown
|
guessed |
Relationships
reference
GCVE-1988-2026-0227 (this record)
- related CVE-2026-21640
- related CVE-2026-21641
- related CVE-2026-21642
- related CVE-2026-21663
- related CVE-2026-21664
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}
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"value": "========================================================================\nRevive Adserver Security Advisory REVIVE-SA-2026-001\n------------------------------------------------------------------------\nhttps://www.revive-adserver.com/security/revive-sa-2026-001\n------------------------------------------------------------------------\nDate: 2026-01-14\nRisk Level: High\nApplications affected: Revive Adserver\nVersions affected: \u003c= 6.0.4\nVersions not affected: \u003e= 6.0.5\nWebsite: https://www.revive-adserver.com/\n========================================================================\n\n\n========================================================================\nVulnerability 1: Format string injection\n========================================================================\nVulnerability Type: Use of Externally-Controlled Format String\n [CWE-134]\nCVE-ID: CVE-2026-21640\nRisk level: Low\nCVSS Base Score: 2.7\nCVSS Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L\n========================================================================\n\nDescription\n-----------\n\n\nDetails\n-------\n\n\nReferences\n----------\nhttps://hackerone.com/reports/3445332\nhttps://github.com/revive-adserver/revive-adserver/commit/c40187d8\nhttps://cwe.mitre.org/data/definitions/134.html\n\n\n========================================================================\nVulnerability 2: Authorization Bypass\n========================================================================\nVulnerability Type: Authorization Bypass Through User-Controlled Key\n [CWE-639]\nCVE-ID: CVE-2026-21641\nRisk level: High\nCVSS Base Score: 7.1\nCVSS Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L\n========================================================================\n\nDescription\n-----------\n\n\nDetails\n-------\n\n\nReferences\n----------\nhttps://hackerone.com/reports/3445710\nhttps://github.com/revive-adserver/revive-adserver/commit/f6059335\nhttps://cwe.mitre.org/data/definitions/639.html\n\n\n========================================================================\nVulnerability 3: Reflected XSS\n========================================================================\nVulnerability Type: Improper Neutralization of Input During Web Page\n Generation (\u2018Cross-site Scripting\u2019) [CWE-79]\nCVE-ID: CVE-2026-21642\nRisk level: Medium\nCVSS Base Score: 6.1\nCVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\n========================================================================\n\nDescription\n-----------\n\n\nDetails\n-------\n\n\nReferences\n----------\nhttps://hackerone.com/reports/3470970\nhttps://github.com/revive-adserver/revive-adserver/commit/e245a88\nhttps://github.com/revive-adserver/revive-adserver/commit/0ebc96d\nhttps://cwe.mitre.org/data/definitions/79.html\n\n\n========================================================================\nVulnerability 4: Reflected XSS\n========================================================================\nVulnerability Type: Improper Neutralization of Input During Web Page\n Generation (\u2018Cross-site Scripting\u2019) [CWE-79]\nCVE-ID: CVE-2026-21663\nRisk level: Medium\nCVSS Base Score: 6.1\nCVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\n========================================================================\n\nDescription\n-----------\n\n\nDetails\n-------\n\n\nReferences\n----------\nhttps://hackerone.com/reports/3473696\nhttps://github.com/revive-adserver/revive-adserver/commit/c130eb0\nhttps://cwe.mitre.org/data/definitions/79.html\n\n\n========================================================================\nVulnerability 5: Reflected XSS\n========================================================================\nVulnerability Type: Improper Neutralization of Input During Web Page\n Generation (\u2018Cross-site Scripting\u2019) [CWE-79]\nCVE-ID: CVE-2026-21664\nRisk level: Medium\nCVSS Base Score: 6.1\nCVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N\n========================================================================\n\nDescription\n-----------\n\n\nDetails\n-------\n\n\nReferences\n----------\nhttps://hackerone.com/reports/3468169\nhttps://github.com/revive-adserver/revive-adserver/commit/e88e9ed\nhttps://github.com/revive-adserver/revive-adserver/commit/7a99f69\nhttps://cwe.mitre.org/data/definitions/79.html\n\n\n========================================================================\nSolution\n========================================================================\n\n\n\n\n========================================================================\nContact Information\n========================================================================\n\nThe security contact for Revive Adserver can be reached at:\n\u003csecurity AT revive-adserver DOT com\u003e.\n\n\n\n\n--\nMatteo Beccati\nOn behalf of the Revive Adserver Team\nhttps://www.revive-adserver.com/\n\n_______________________________________________\nSent through the Full Disclosure mailing list\nhttps://nmap.org/mailman/listinfo/fulldisclosure\nWeb Archives \u0026 RSS: https://seclists.org/fulldisclosure/"
}
],
"problemTypes": [
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},
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},
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},
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}
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},
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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.
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Vulnerability timeline
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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.
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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.