CVE-2025-23023

Summary

CVE-2025-23023 is a vulnerability affecting Discourse, an open-source community discussion platform. An attacker can manipulate request headers to contaminate the anonymous cache, potentially injecting missing preloaded data. This issue solely impacts anonymous visitors to the site. Discourse has released a patch for this vulnerability, and users are strongly encouraged to upgrade. For those unable to upgrade, Discourse recommends setting the `DISCOURSE_DISABLE_ANON_CACHE` environment variable to prevent anonymous caching.

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