CVE-2025-48053 — Discourse vulnerable to DoS via large URL payload in PM to a bot

Description (CNA)

Discourse is an open-source discussion platform. Prior to version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch, sending a malicious URL in a PM to a bot user can cause a reduced the availability of a Discourse instance. This issue is patched in version 3.4.4 of the `stable` branch, version 3.5.0.beta5 of the `beta` branch, and version 3.5.0.beta6-dev of the `tests-passed` branch. No known workarounds are available.

Affected (CNA)

Vendor / product	Versions
discourse / discourse	affected < 3.4.4; affected < 3.5.0.beta5; affected < 3.5.0.beta6-dev

CWE

CWE-400, CWE-770

References

https://github.com/discourse/discourse/security/advisories/GHSA-3q5q-qmrm-rvwx

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.