Medium severity · published Oct 1, 2025
CVE-2025-58054
Discourse is vulnerable to XSS when quoting chat messages
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
Discourse is an open-source community discussion platform. Versions 3.5.0 and below are vulnerable to XSS attacks through parsing and rendering of chat channel titles and chat thread titles via the quote message functionality when using the rich text editor. This issue is fixed in version 3.5.1.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
discourse · discourse
< 3.5.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-58054
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-58054
Patch
https://github.com/discourse/discourse/commit/3a224fd546d894ee408e7414b6879e814a792f91
Vendor Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-7p47-8m82-m2vf
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