CVE-2026-25892

Adminer is open-source database management software. Adminer v5.4.1 and earlier has a version check mechanism where adminer.org sends signed version info via JavaScript postMessage, which the browser then POSTs to ?script=version. This endpoint lacks origin validation and accepts POST data from any source. An attacker can POST version[] parameter which PHP converts to an array. On next page load, openssl_verify() receives this array instead of string and throws TypeError, returning HTTP 500 to all users. Upgrade to Adminer 5.4.2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3	Patch
https://github.com/vrana/adminer/releases/tag/v5.4.2	Product Release Notes
https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-09 22:16

Updated : 2026-06-17 10:25

NVD link : CVE-2026-25892

Mitre link : CVE-2026-25892

CVE.ORG link : CVE-2026-25892

JSON object : View

Products Affected

adminer

adminer

CWE

CWE-20

Improper Input Validation

NVD-CWE-noinfo

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