CVE-2020-25288

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-09-30 · updated 2026-06-17
Weakness: CWE-79

Description

An issue was discovered in MantisBT before 2.24.3. When editing an Issue in a Project where a Custom Field with a crafted Regular Expression property is used, improper escaping of the corresponding form input's pattern attribute allows HTML injection and, if CSP settings permit, execution of arbitrary JavaScript.

Affected products

mantisbt: before 2.24.3 — fixed in 2.24.3

How to fix

Upgrade to a fixed version: mantisbt 2.24.3. Check the vendor advisory for mitigations.

References

http://github.com/mantisbt/mantisbt/commit/221cf323f16a9738a5b27aaba94758f11281d85c
https://mantisbt.org/bugs/view.php?id=27275
http://github.com/mantisbt/mantisbt/commit/221cf323f16a9738a5b27aaba94758f11281d85c
https://mantisbt.org/bugs/view.php?id=27275

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