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TI-2023-03266 Aliases CVE-2023-3500GHSA-xgmj-r659-f4c7

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.0 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A reflected XSS was possible when creating specific PlantUML diagrams that allowed the attacker to perform arbitrary actions on behalf of victims.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00529 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 16.0.8, 16.1.3, 16.2.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GitLabGitLab10.0 to before 16.0.8; 16.1 to before 16.1.3; 16.2 to before 16.2.216.0.8, 16.1.3, 16.2.2Patch availableCNA
  • GitLab VendorGitLab Affected 10.0 to before 16.0.8; 16.1 to before 16.1.3; 16.2 to before 16.2.2 Fixed in 16.0.8, 16.1.3, 16.2.2 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*10.0 to before 16.0.8VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*10.0 to before 16.0.8VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*16.1 to before 16.1.3VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*16.1 to before 16.1.3VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*16.2 to before 16.2.2VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*16.2 to before 16.2.2VulnerableGitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 10.0 to before 16.0.8 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 10.0 to before 16.0.8 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.1 to before 16.1.3 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.1 to before 16.1.3 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.2 to before 16.2.2 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.2 to before 16.2.2 Vulnerable ·GitLab

Remediation

  • Fix · CNA GitLab (GitLab) Fixed in 16.0.8, 16.1.3, 16.2.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    GitLab 16.0.8, 16.1.3, 16.2.2

    5 records Highest priority Priority HIGH 1 HIGH, 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2023-03709 Inefficient Regular Expression Complexity in GitLabPriority HIGH 72
    • TI-2023-03180 Improper Control of Generation of Code ('Code Injection') in GitLabPriority MEDIUM 64
    • TI-2023-01899 Missing Authorization in GitLabPriority MEDIUM 53
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat OpenShift Container Platform 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-3500
  2. 2026-10-03 Alias added: GHSA-xgmj-r659-f4c7

References

Exploit 1

Other 1

  • TI-2026-71508 Integer overflow in GitLab allows code execution on the server KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-58817 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2023-06425 Weak Password Recovery Mechanism for Forgotten Password in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-05191 Code injection in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-05161 Server-side request forgery in GitLab KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-02763 Injection in GitLab CVSS 3.1CRITICAL 9.9
See all 1506 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences