CVE-2025-8405 (GCVE-0-2025-8405)
Vulnerability from cvelistv5 – Published: 2025-12-11 04:05 – Updated: 2026-02-26 16:21
VLAI
EPSS
VEX
Title
Improper Encoding or Escaping of Output in GitLab
Summary
GitLab has remediated a security issue in GitLab CE/EE affecting all versions from 17.1 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to perform unauthorized actions on behalf of other users by injecting malicious HTML into vulnerability code flow displays.
Severity
7.7 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-12 04:55 UTC
CWE
- CWE-116 - Improper Encoding or Escaping of Output
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://gitlab.com/gitlab-org/gitlab/-/issues/558214 | issue-trackingpermissions-required |
| https://hackerone.com/reports/3270940 | technical-descriptionexploitpermissions-required |
| https://about.gitlab.com/releases/2025/12/10/patc… |
Impacted products
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| Author | Source | Type | Date | Other |
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Nomenclature
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They have not been verified by an analyst and are provided for guidance only.
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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