CVE-2026-25892 | Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint

Exp

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.

Published: 2026-02-09 Last update: 2026-02-20 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-25892 is rated High Exploit Risk (76.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.46%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2026-25892

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2026-25892

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-13 4.30% 4.46% +0.16%
2 2026-04-27 5.01% 4.30% -0.72%
3 2026-04-21 — 5.01% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-25892

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2026-25892

GitHub Security Advisory for CVE-2026-25892

GHSA-q4f2-39gr-45jh · Severity: high · Ecosystem: composer — Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint

OS Trackers for CVE-2026-25892

vendor priority summary link
debian unimportant CVE-2026-25892 unimportant priority: Debian including 1 source packages (adminer), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2026-25892
suse high — https://www.suse.com/security/cve/CVE-2026-25892/
ubuntu medium CVE-2026-25892 medium priority: Ubuntu including 1 source packages (adminer), 7 status rows across 7 suites (bionic, focal, jammy, noble, questing, upstream, xenial): needs-triage 7. https://ubuntu.com/security/CVE-2026-25892

Affected software / configurations for CVE-2026-25892

Vendor Product Version Raw CPE
adminer adminer >= 4.6.2, < 5.4.2 cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*

References for CVE-2026-25892

cvelogic Threat Intelligence