Medium severity · published Oct 28, 2025
CVE-2025-61598
Discourse is missing Cache-Control response header on error responses
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DI
discourse · discourse
< 3.6.2; >= 3.6.0.beta1, < 3.6.0.beta2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-61598
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-61598
Patch
https://github.com/discourse/discourse/commit/3ea1b663c82c067e5ca778db846bad1e082ba6cd
Patch
https://github.com/discourse/discourse/commit/fd567af7bf5a15c70772021acbdf5d38487a31bc
Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jp9x-wwv6-cv3j
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