CVE-2026-25892

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/9/2026

Last Modified2/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

adminer:adminer

Weaknesses (CWE)

CWE-20

References

https://github.com/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3(security-advisories@github.com)

https://github.com/vrana/adminer/releases/tag/v5.4.2(security-advisories@github.com)

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

IOC Correlations

No correlations recorded

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