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Vulnerability record · CVE-2026-33548 · published 23 March 2026

CVE-2026-33548: Mantisbt cross-site scripting vulnerability

Mantisbt · Mantisbt

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, improper escaping of tag names retrieved from History in Timeline (my_view_page.php) allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript, when displaying a tag that has been renamed or deleted. Version 2.28.1 contains a patch. Workarounds include editing offending History entries (using SQL) and wrapping `$this->tag_name` in a string_html_specialchars() call in IssueTagTimelineEvent::html().

8.6 CVSS 4.0 High EPSS 0.29% · top 81.0% CWE-79 · Cross-site scripting
8.6CVSS 4.0 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, improper escaping of tag names retrieved from History in Timeline (my_view_page.php) allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript, when displaying a tag that has been renamed or deleted. Version 2.28.1 contains a patch. Workarounds include editing offending History entries (using SQL) and wrapping `$this->tag_name` in a string_html_specialchars() call in IssueTagTimelineEvent::html().

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/mantisbt/mantisbt/commit/f32787c14d4518476fe7f05f992dbfe6eaccd815 Patch
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-73vx-49mv-v8w5 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.6CVE-2019-15074Mantisbt cross-site scripting vulnerabilityThe Timeline feature in my_view_page.php in MantisBT through 2.21.1 has a stored cross-site scripting (XSS) vulnerability, allowing execution of arbi…EPSS 2.1%9.3CVE-2026-30849Mantisbt vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. Versions prior to 2.28.1 running on MySQL family databases are affected by an authenti…EPSS 2.4%8.8CVE-2025-47776Mantisbt vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. Due to incorrect use of loose (==) instead of strict (===) comparison in the authentic…EPSS 0.32%8.8CVE-2017-7615MantisBT weak password reset allows unauthenticated admin accessMantisBT through 2.3.0 mishandles password reset confirmation, allowing an attacker to supply an empty confirm_hash value to verify.php. This permits…EPSS 91%analysed8.6CVE-2026-33517Mantisbt cross-site scripting vulnerabilityMantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, when deleting a Tag (tag_delete.php), improper escaping of its name…EPSS 0.35%8.3CVE-2024-23830Mantisbt injection vulnerabilityMantisBT is an open source issue tracker. Prior to version 2.26.1, an unauthenticated attacker who knows a user's email address and username can hija…EPSS 0.96%8.1CVE-2009-20001Mantisbt insufficient session expiration vulnerabilityAn issue was discovered in MantisBT before 2.24.5. It associates a unique cookie string with each user. This string is not reset upon logout (i.e., t…EPSS 0.87%7.8CVE-2021-43257Mantisbt csv injection vulnerabilityLack of Neutralization of Formula Elements in the CSV API of MantisBT before 2.25.3 allows an unprivileged attacker to execute code or gain access to…EPSS 0.98%

Source: NIST National Vulnerability Database (record CVE-2026-33548), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.