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GHSA-j7v9-f46r-2rp4

Fix: mantisbt/mantisbt@c885af1

GHSA-j7v9-f46r-2rp4 is a security vulnerability in mantisbt/mantisbt. O3 Security confirms whether GHSA-j7v9-f46r-2rp4 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

MantisBT is Vulnerable to Reflected XSS in Rendering Dynamic Custom Textarea Field

Also known asCVE-2026-41897
Published
May 11, 2026
Updated
Jun 9, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Jun 9, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐘mantisbt/mantisbt

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Lack of validation of filter_target parameter on return_dynamic_filters.php (normally used as an AJAX in View Issues Page) allows an attacker to inject arbitrary HTML if the target is a TEXTAREA custom field.

Impact

Cross-site scripting (XSS)

Patches

  • c885af13f0b8596714ffe11df757c09f35fbd8f4

Workarounds

None

Credits

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

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmantisbt/mantisbt1.0.0&&< 2.28.22.28.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mantisbt/mantisbt. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update mantisbt/mantisbt to 2.28.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-j7v9-f46r-2rp4 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-j7v9-f46r-2rp4 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-j7v9-f46r-2rp4. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Lack of validation of filter_target parameter on return_dynamic_filters.php (normally used as an AJAX in View Issues Page) allows an attacker to inject arbitrary HTML if the target is a TEXTAREA custom field. ### Impact Cross-site scripting (XSS) ### Patches - c885af13f0b8596714ffe11df757c09f35fbd8f4 ### Workarounds None ### Credits Thanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.
O3 Security · Impact-Aware SCA

Is GHSA-j7v9-f46r-2rp4 in your dependencies?

O3 detects GHSA-j7v9-f46r-2rp4 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-j7v9-f46r-2rp4: mantisbt/mantisbt… | O3 Security