CVE-2025-61598: discourse — Fix

Description

Discourse is an open source discussion platform. Version before 3.6.2 and 3.6.0.beta2, default Cache-Control response header with value no-store, no-cache was missing from error responses. This may caused unintended caching of those responses by proxies potentially leading to cache poisoning attacks. This vulnerability is fixed in 3.6.2 and 3.6.0.beta2.

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CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-524 CWE-524

Affected Products

Vendor	Product	Versions
discourse	discourse	< 3.5.2
discourse	discourse	< 3.6.0
discourse	discourse	All

References

Advisories & Patches

https://github.com/discourse/discourse/commit/3ea1b663c82c067e5ca778db846bad1e082ba6cd https://github.com/discourse/discourse/commit/fd567af7bf5a15c70772021acbdf5d38487a31bc

Other References

https://github.com/discourse/discourse/security/advisories/GHSA-jp9x-wwv6-cv3j

Frequently Asked Questions

What is CVE-2025-61598? +

Discourse is an open source discussion platform. Version before 3.6.2 and 3.6.0.beta2, default Cache-Control response header with value no-store, no-cache was missing from error responses. This may caused unintended caching of those responses by proxies potentially leading to cache poisoning attacks. This vulnerability is fixed in 3.6.2 and 3.6.0.beta2. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-61598? +

CVE-2025-61598 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-61598? +

CVE-2025-61598 affects products from discourse, specifically: discourse. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-61598? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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