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CVE-2025-30189 is an authentication cache consistency flaw in Dovecot core, described as a v2.4 regression affecting several passdb and userdb drivers when auth caching is enabled. The vulnerable logic incorrectly assigns the same cache key to different users, causing passdb/userdb results for one user to be reused for other users sharing that cache key. As a result, once a login has been cached, subsequent authentication attempts may use incorrect cached identity information and be treated as the same user. The issue affects OX Dovecot CE core 2.4.0 and OX Dovecot Pro core 3.1.0; the first fixed CE release is 2.4.1.
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No public exploit code observed for this vulnerability.
9 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.