CVE-2020-25288: MantisBT XXS where a Custom Field with a crafted Regular Expression property is used

May 24, 2022 (updated May 29, 2025)

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.

References

github.com/advisories/GHSA-qgrr-f26j-87vf
github.com/mantisbt/mantisbt
github.com/mantisbt/mantisbt/commit/221cf323f16a9738a5b27aaba94758f11281d85c
mantisbt.org/bugs/view.php?id=27275
nvd.nist.gov/vuln/detail/CVE-2020-25288

Code Behaviors & Features

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