EUVD-2026-48161
GHSA-r27m-w6r8-wgrx
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Network-accessible plugin endpoint, low-complexity bypass, subscriber authentication required; only limited integrity impact with no confidentiality or availability effect.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
Lifecycle Timeline
1DescriptionCVE.org
Subscriber Broken Access Control in Participants Database <= 2.7.8.4 versions.
AnalysisAI
Broken Access Control in the Participants Database WordPress plugin (versions <= 2.7.8.4) permits authenticated subscriber-level users to perform privileged write operations that should be restricted to higher roles such as editors or administrators. The CVSS vector (PR:L/I:L/C:N/A:N) confirms low-privileged network exploitation resulting in unauthorized integrity impact with no confidentiality or availability consequences. No public exploit code and no CISA KEV listing have been identified at time of analysis.
Technical ContextAI
CWE-862 (Missing Authorization) describes a failure to verify that an authenticated user holds sufficient permission before executing a sensitive operation. In WordPress plugins, this class of flaw typically manifests when plugin endpoints or AJAX handlers check only that a user is logged in (nonce or is_user_logged_in()) without validating the user's capability (e.g., current_user_can()). The affected product, CPE cpe:2.3:a:roland_barker:participants_database:*:*:*:*:*:*:*:*, is a WordPress plugin by Roland Barker designed to manage structured participant or member records. Subscriber is the lowest authenticated WordPress role, making the privilege bar for exploitation minimal on any site that allows open user registration.
RemediationAI
Update the Participants Database plugin to a version beyond 2.7.8.4 as soon as a patched release is published by Roland Barker. The Patchstack advisory at https://patchstack.com/database/wordpress/plugin/participants-database/vulnerability/wordpress-participants-database-plugin-2-7-8-4-broken-access-control-vulnerability should be monitored for a confirmed fix version, which has not been independently confirmed from available data. As a compensating control, disable open user registration on the WordPress site (Settings > General > uncheck 'Anyone can register') to prevent unauthenticated visitors from obtaining the subscriber role needed for exploitation. Alternatively, use a capability management plugin to remove write capabilities from the subscriber role for plugin-specific actions, though this may break legitimate subscriber functionality. Neither workaround substitutes for a vendor-released patch.
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
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