CVE-2025-48053
High
Description
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Discourse
PublishedJun 9, 2025
First seenJun 9, 2025
How to fix
Update
- discourse discourse3.4.4, 3.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| discourse discourse | v < 3.4.4, v < 3.5.0, 3.5.0 | 3.4.4, 3.5.0 |
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