CVE-2026-25892

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

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.

Affected

vrana · adminer

CVSS v3.1 GITHUB

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

2.07% chance of exploitation in the next 30 days, 81st percentile

Nuclei

high · CWE-20

Published

2026-02-09

Updated

2026-02-10

Proof-of-concept exploits (2)

• advisories/GHSA-q4f2-39gr-45jh
• dzmind2312/CVE_2026_258920★ · 2026-02-26

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-25892.yaml

Security advisories

• vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh
• vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3

References

• CVE Record
• NVD entry

Related

• CVE-2024-34444
• CVE-2026-23550