CVE-2026-59978
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk51th percentile - higher than 51% of all known CVEs
Summary
In AdminNeo (a PHP database management tool) versions 4.6.2 through 5.4.x, the unauthenticated ?script=version endpoint accepts POST data without origin, CSRF, or parameter-type validation. A version[] parameter becomes a PHP array that bootstrap.inc.php serializes into the shared adminneo.version cache, and design.inc.php later passes that value to cookie() and rawurlencode(), causing a TypeError. An attacker can make the instance return HTTP 500 to all users for the cache's 24-hour lifetime or until the poisoned cache is removed.
Risk Assessment
An unauthenticated attacker can poison the shared cache and cause persistent denial of service for all users of the instance. This requires the web server to be able to write the cache.
Recommendation
Upgrade AdminNeo to version 5.5.0 or later. As an interim workaround, make the adminneo.version cache unwritable by the web server.
Related vulnerabilities
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Original NVD description (English source)
AdminNeo is a full-featured database management tool written in PHP. From 4.6.2 until 5.5.0, the unauthenticated `?script=version` endpoint accepts POST data without origin, CSRF or parameter-type validation. A `version[]` parameter becomes a PHP array that `bootstrap.inc.php` serializes into the shared `adminneo.version` cache. On later page loads, `design.inc.php` passes that cached value to `cookie()` and `rawurlencode()`, causing a `TypeError` rather than encoding a version string. A remote attacker can make the instance return HTTP 500 to all users for the cache's twenty-four-hour lifetime or until the poisoned cache is removed. Exploitation requires the web server to be able to write that shared cache; making it unwritable is an interim workaround. The issue retains the underlying type-validation defect reported previously in Adminer despite changes to AdminNeo's version-checking flow. This issue is fixed in version 5.5.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS