CVE-2025-67723 json
Discourse vulnerable to stored Cross-site Scripting via Katex in discourse-math plugin
published 2026-01-28 9 mo ago modified 2026-09-08 2 mo ago also BIT-discourse-2025-67723 , EUVD-2025-206450 , GHSA-955h-m28g-5379
- cvss
- 4.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
Discourse is an open source discussion platform. Versions prior to 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0 have a content-security-policy-mitigated cross-site scriptinv vulnerability on the Discourse Math plugin when using its KaTeX variant. This issue is patched in versions 3.5.4, 2025.11.2, 2025.12.1, and 2026.1.0. As a workaround, the Discourse Math plugin can be disabled, or the Mathjax provider can be used instead of KaTeX.
Patch / fix
- bitnami discourse 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0
- discourse discourse 3.5.4, 2025.11.2, 2025.12.1, 2026.1.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9 mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <3.5.4 >=2025.11.0, <2025.11.2 >=2025.12.0, <2025.12.1 >=2026.1.0, <2026.1.0 |
3.5.4 2025.11.2 2025.12.1 2026.1.0 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/discourse/discourse/security/advisories/GHSA-955h-m28g-5379
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-67723
web
Sources
- CVE List CVE-2025-67723
- NVD CVE-2025-67723
- OSV BIT-discourse-2025-67723
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.