CVE-2025-24900
HighSummary
Concorde, wcześniej znany jako Nexkey, ma podatność związaną z brakiem zabezpieczeń CSRF oraz niewłaściwymi ustawieniami ciasteczek dla uwierzytelniania MediaProxy. W wersjach przed 12.25Q1.1 ciasteczko uwierzytelniające nie ma atrybutu SameSite, co pozwala atakującemu na ominięcie uwierzytelniania MediaProxy i ładowanie dowolnych obrazów bez ograniczeń.
Risk Assessment
Ominięcie uwierzytelniania MediaProxy oraz strony zarządzania kolejką zadań (bull-board) może prowadzić do ataków, które mają znaczący wpływ na dostępność i integralność systemu.
Recommendation
Zaleca się aktualizację do wersji 12.25Q1.1, która zawiera poprawkę. Nie ma skutecznego obejścia poza aktualizacją do najnowszej wersji.
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Original NVD description (English source)
Concorde, formerly know as Nexkey, is a fork of the federated microblogging platform Misskey. Due to a lack of CSRF countermeasures and improper settings of cookies for MediaProxy authentication, there is a vulnerability that allows MediaProxy authentication to be bypassed. In versions prior to 12.25Q1.1, the authentication cookie does not have the SameSite attribute. This allows an attacker to bypass MediaProxy authentication and load any image without restrictions under certain circumstances. In versions prior to 12.24Q2.3, this cookie was also used to authenticate the job queue management page (bull-board), so bull-board authentication is also bypassed. This may enable attacks that have a significant impact on availability and integrity. The affected versions are too old to be covered by this advisory, but the maintainers of Concorde strongly recommend not using older versions. Version 12.25Q1.1 contains a patch. There is no effective workaround other than updating.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

