CVE-2026-33517 json
MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation
published 2026-03-23 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14523 , GHSA-fh48-f69w-7vmp
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
Mantis 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 when displaying the confirmation message allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript. Version 2.28.1 fixes the issue. Workarounds include reverting commit d6890320752ecf37bd74d11fe14fe7dc12335be9 and/or manually editing language files to remove the sprintf placeholder `%1$s` from `$s_tag_delete_message` string.
Patch / fix
- packagist mantisbt/mantisbt 2.28.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.6 | 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 |
| CNA | 4.0 | 8.6 | 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:X/V:X/RE:X/U:X |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | mantisbt/mantisbt | >=2.28.0, <2.28.1 |
2.28.1 |
Affected products
- mantisbt mantisbt
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/mantisbt/mantisbt/commit/80990f43153167c73f11eb4b2bc7108d0c3d6b46
web, patch
-
github.com
/mantisbt/mantisbt/commit/d6890320752ecf37bd74d11fe14fe7dc12335be9
web, patch
-
github.com
/mantisbt/mantisbt/security/advisories/GHSA-fh48-f69w-7vmp
web, mitigation, patch, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-33517
advisory
-
github.com
/mantisbt/mantisbt
package
-
mantisbt.org
/bugs/view.php?id=36971
web
Sources
- CVE List CVE-2026-33517
- GitHub Advisory GHSA-fh48-f69w-7vmp
- NVD CVE-2026-33517
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.