HIGH

CVE-2026-25892

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

CVSS v3

7.5

HIGH

EPSS Score

2.1 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

vrana/adminerPackagistfrom 4.6.2 · fixed in 5.4.2

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-02-09
Last Modified: 2026-02-20

Frequently asked questions

What is CVE-2026-25892?

Is CVE-2026-25892 actively exploited?

Active exploitation of CVE-2026-25892 has not been confirmed. Its EPSS score was 2.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25892?

CVE-2026-25892 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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