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GHSA-qj6w-v29q-4rgx

MediumCVSS 5.4 / 10
Published May 11, 2026·Last modified May 11, 2026
Affected Components(0)

No affected components available

Description

Improper escaping of a textarea custom field's contents in the Update Issue page (bug_update_page.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
Risk Scores
Base Score
5.4

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.

Threat Intelligence
5.0

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.23%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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