BaseFortify

Publication date: 2025-10-28

Last updated on: 2025-12-03

Assigner: GitHub, Inc.

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 Scores

EPSS Scores

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Meta Information

Published

2025-10-28

Last Modified

2025-12-03

Generated

2026-07-06

AI Q&A

2025-10-28

EPSS Evaluated

2026-07-05

NVD

CVE-2025-61598

Affected Vendors & Products

Vendor	Product	Version / Range
discourse	discourse	to 3.5.2 (exc)
discourse	discourse	to 3.6.0 (exc)
discourse	discourse	3.6.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-524	The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere.

Attack-Flow Graph

Executive Summary

This vulnerability in Discourse versions before 3.6.2 and 3.6.0.beta2 involves missing Cache-Control response headers (no-store, no-cache) on error responses. Without these headers, error responses could be cached by proxies unintentionally, which may lead to cache poisoning attacks where malicious or outdated error responses are served to users.

Impact Analysis

The vulnerability can lead to cache poisoning attacks, meaning that users might receive incorrect or malicious error responses cached by proxies. This can cause confusion, misinformation, or potential security risks if sensitive error information is cached and served improperly.

Mitigation Strategies

Upgrade Discourse to version 3.6.2 or 3.6.0.beta2 where the vulnerability is fixed. Ensure that error responses include the Cache-Control header with the value 'no-store, no-cache' to prevent unintended caching by proxies.

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