Graylog Allows Stored Cross-Site Scripting via Files Plugin and API Browser
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-79.
Summary
### Impact Two minor vulnerabilities were identified in the Graylog2 enterprise server, which can be combined to carry out a stored cross-site scripting attack. An attacker with the permission `FILES_CREATE` can exploit these vulnerabilities to upload arbitrary Javascript code to the Graylog2 server, which - upon requesting of the file by a user of the API browser - results in the execution of this Javascript code in the context of the Graylog frontend application. This enables the attacker to carry out authenticated API requests with the permissions of the logged-in user, thereby taking over the user session. ### Patches The generic API has been removed in 6.2.0 rendering the attack vector unreachable and additional escaping has been added. Analysis provided by Fabian Yamaguchi - Whirly Labs (Pty) Ltd
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | org.graylog2:graylog2-server (Maven) | before 6.2.0 | 6.2.0 | Patch available | GHSA-q9q2-3ppx-mwqf |
- org.graylog2:graylog2-server (Maven) Vendor— Affected before 6.2.0 Fixed in 6.2.0 Patch available GHSA-q9q2-3ppx-mwqf
Remediation
- Fix · GHSA-q9q2-3ppx-mwqf org.graylog2:graylog2-server (Maven) Fixed in 6.2.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-q9q2-3ppx-mwqf
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences