GHSA-j3v9-553h-x28j

Suggest an improvement
Source
https://github.com/advisories/GHSA-j3v9-553h-x28j
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-j3v9-553h-x28j/GHSA-j3v9-553h-x28j.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-j3v9-553h-x28j
Aliases
  • CVE-2026-40596
Published
2026-05-11T19:34:38Z
Modified
2026-05-11T19:49:05.951774Z
Severity
  • 7.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:L CVSS Calculator
Summary
MantisBT is Vulnerable to XSS leading to account takeover via updating a user's font family preference
Details

Any authenticated user can inject arbitrary HTML via updating their account's font family.

Impact

Cross-site scripting. The injected payload will be reflected in every MantisBT page.

Leveraging another vulnerability (CSP bypass, see GHSA-9c3j-xm6v-j7j3), the attacker could achieve account takeover.

Patches

  • 9e8409cdd979eba86ef532756fc47c1d8112d22d

Workarounds

None

Credits

Thanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.

Database specific 
{
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-11T19:34:38Z",
    "cwe_ids": [
        "CWE-79"
    ],
    "severity": "HIGH",
    "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
2.11.0
Fixed
2.28.2

Affected versions

2.*
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-j3v9-553h-x28j/GHSA-j3v9-553h-x28j.json"
last_known_affected_version_range 
"<= 2.28.1"