CVE-2026-25892

Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint

Published: Feb 9, 2026Updated: Feb 20, 2026 Sources: CVE List NVD GHSACWE-20

7.5HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-20 NVD-CWE-noinfo

Affected Products

vrana

oss-projectaka adminer

adminerOn-prem

Databases / db-tooling

adminer

oss-projectaka admin er

adminerOn-prem

Databases / db-tooling

Packagist

package-ecosystem

vrana/adminer

OSS Libraries

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Initial Access

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References

https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh

github.com

https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3

github.com

https://github.com/vrana/adminer/releases/tag/v5.4.2

github.com

and 2 more references View all →

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