BIT-discourse-2025-48954

vendorUSosv

Discourse vulnerable to XSS via user-provided query parameter in oauth failure flow

view advisory published 2025-07-01Licence: per source

Discourse is an open-source discussion platform. Versions prior to 3.5.0 are vulnerable to cross-site scripting when the content security policy isn't enabled when using social logins. Version 3.5.0 patches the issue. As a workaround, have the content security policy enabled.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-48954US	medium6.1	0.74% (54th)	—	2025-06-25
Discourse is an open-source discussion platform. Versions prior to 3.5.0.beta6 are vulnerable to cross-site scripting when the content security policy isn't enabled when using soci…

references

External citations — patches, advisories, analysis.

https://github.com/discourse/discourse/security/advisories/GHSA-26p5-mjjh-wfcfADVISORY
https://nvd.nist.gov/vuln/detail/CVE-2025-48954WEB

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