SecuriTricks - CVE-2025-67723

Description

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.

Product(s) Impacted

Vendor	Product	Versions
Discourse	Discourse	3.5.0-3.5.4, 2025.11.0-2025.11.2, 2025.12.0-2025.12.1, 2026.1.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	discourse	discourse	3.5.0-3.5.4	/	/	/	/	/	/	/
a	discourse	discourse	2025.11.0-2025.11.2	/	/	/	/	/	/	/
a	discourse	discourse	2025.12.0-2025.12.1	/	/	/	/	/	/	/
a	discourse	discourse	2026.1.0	/	/	/	/	/	/	/

References

https://github.com/discourse/discourse/security/advisories/GHSA-955h-m28g-5379

CVSS Score

4.6 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: LOW
Availability Impact: LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

View Vector String

Timeline

Published: Jan. 28, 2026, 7:16 p.m.
Last Modified: Jan. 29, 2026, 4:31 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2025-67723