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Vulnerability · Published May 28, 2026 · Assigned by GitHub_M

CVE-2026-41897MantisBT: Reflected XSS in Rendering Dynamic Custom Textarea Field

Medium 5.3

In plain English

A medium-severity cross-site scripting in mantisbt from mantisbt. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.3Medium
Exploit odds (30 days)0.3%top 79.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 1.0.0 to 2.28.1, 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. This vulnerability is fixed in 2.28.2.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagistmantisbt/mantisbt2.28.2GHSA-j7v9-f46r-2rp4

Affected products (as reported)

VendorProductVersions
mantisbt mantisbt >= 1.0.0, < 2.28.2

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References