MantisBT: Stored XSS in File Download
Priority LOW 35CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, using show_inline=1 parameter and a valid file_show_inline_token CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. This vulnerability is fixed in 2.28.2.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00349 28th percentileScored 2026-11-07
Fix Fixed mantisbt (mantisbt): 2.28.2mantisbt/mantisbt (Packagist): 2.28.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| mantisbt | mantisbt | before 2.28.2 | 2.28.2 | Patch available | CNA |
| — | mantisbt/mantisbt (Packagist) | before 2.28.2 | 2.28.2 | Patch available | GHSA-p6fr-rxq7-xcg8 |
- mantisbt Vendormantisbt Affected before 2.28.2 Fixed in 2.28.2 Patch available CNA
- mantisbt/mantisbt (Packagist) Vendor— Affected before 2.28.2 Fixed in 2.28.2 Patch available GHSA-p6fr-rxq7-xcg8
Remediation
- Fix · CNA mantisbt (mantisbt) Fixed in 2.28.2
- Fix · GHSA-p6fr-rxq7-xcg8 mantisbt/mantisbt (Packagist) Fixed in 2.28.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44657
- 2026-10-03 Alias added: GHSA-p6fr-rxq7-xcg8
References
Other 5
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-p6fr-rxq7-xcg8
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3
- https://github.com/mantisbt/mantisbt/commit/26647b2e68ba30b9d7987d4e03d7a16416684bc2
- https://mantisbt.org/bugs/view.php?id=37020
- https://github.com/mantisbt/mantisbt
More mantisbt vulnerabilities
- TI-2017-05251 MantisBT through 2.3.0 allows arbitrary password reset and unauthenticated admin access… CVSS 3.1HIGH 8.8
- TI-2026-29334 MantisBT has Potential Referer-Based Reflected HTML Injection / XSS in Tag Update Page CVSS 4.0MEDIUM 6.9
- TI-2014-05966 The XmlImportExport plugin in MantisBT 1.2.17 and earlier allows remote attackers to… CVSS 2.0HIGH 7.5
- TI-2026-27192 MantisBT Bugnote Revision Page Leaks Private Issue Metadata After Issue Access Is Revoked CVSS 4.0MEDIUM 5.3
- TI-2026-25495 MantisBT: Authorization Bypass in Global Profile Creation CVSS 4.0MEDIUM 5.3
- TI-2026-26676 MantisBT: Privilege Escalation from Manager to Administrator CVSS 4.0MEDIUM 5.1
Sources
- CVE-2026-44657 · CVE Program
- CVE-2026-44657 · NVD
- FIRST EPSS
- GHSA-p6fr-rxq7-xcg8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences