GHSA-qj6w-v29q-4rgx

Suggest an improvement
Source
https://github.com/advisories/GHSA-qj6w-v29q-4rgx
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qj6w-v29q-4rgx/GHSA-qj6w-v29q-4rgx.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-qj6w-v29q-4rgx
Aliases
  • CVE-2026-39960
Published
2026-05-11T19:34:32Z
Modified
2026-05-11T19:49:49.879241Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
MantisBT is Vulnerable to Stored XSS in Custom Field Textarea Values
Details

Improper escaping of a textarea custom field's contents in the Update Issue page (bugupdatepage.php) allows an attacker to inject HTML and, if CSP settings permit, execute arbitrary JavaScript when the page is loaded.

Impact

Session theft leading to admin account takeover, full project data access.

  • Precondition: A textarea-type custom field must be configured for the project
  • Attacker: Authenticated user with bug report permission (low privilege)
  • Victim: Any user viewing the bug edit form, including administrators

Patches

  • 5fec0f448b7a7d7d539a6adb6dccceac4e4e4ab7

Workarounds

The default Content-Security Policy will block script execution.

References

  • https://mantisbt.org/bugs/view.php?id=37003
  • This is related to CVE-2024-34081.

Credits

Thanks to the following security researchers for independently discovering and responsibly reporting the issue, and providing a patch to fix it. - Thanks to Nozomu Sasaki (Paul) (@morimori-dev) - Tristan Madani (@TristanInSec) from Talence Security

Database specific 
{
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-11T19:34:32Z",
    "cwe_ids": [
        "CWE-79"
    ],
    "severity": "MODERATE",
    "nvd_published_at": null
}
References

Affected packages

Packagist / mantisbt/mantisbt

Package

Name
mantisbt/mantisbt
Purl
pkg:composer/mantisbt/mantisbt

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.28.2

Affected versions

2.*
2.3.0
2.3.1
2.3.2
2.3.3
2.4.0
2.4.1
2.4.2
2.5.0
2.5.1
2.5.2
2.6.0
2.7.0
2.7.1
2.8.0
2.8.1
2.9.0
2.9.1
2.10.0
2.10.1
2.11.0
2.11.1
2.12.0
2.12.1
2.12.2
2.13.0
2.13.1
2.13.2
2.14.0
2.15.0
2.15.1
2.16.0
2.16.1
2.17.0
2.17.1
2.17.2
2.18.0
2.18.1
2.19.0
2.19.1
2.20.0
2.20.1
2.21.0
2.21.1
2.21.2
2.21.3
2.22.0
2.22.1
2.22.2
2.23.0
2.23.1
2.24.0
2.24.1
2.24.2
2.24.3
2.24.4
2.24.5
2.25.0
2.25.1
2.25.2
2.25.3
2.25.4
2.25.5
2.25.6
2.25.7
2.25.8
2.26.0
2.26.1
2.26.2
2.26.3
2.26.4
2.27.0
2.27.1
2.27.2
2.27.3
2.28.0
2.28.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qj6w-v29q-4rgx/GHSA-qj6w-v29q-4rgx.json"
last_known_affected_version_range 
"<= 2.28.1"