CVE-2026-25892 json
Adminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version Endpoint
published 2026-02-09 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-6870 , GHSA-q4f2-39gr-45jh
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 77%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
- packagist vrana/adminer 5.4.2
- adminer adminer 5.4.2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
1.69% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Adminer 4.6.2 - 5.4.1 Unauthenticated Persistent DoS nuclei detection template
- github.com https://github.com/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | vrana/adminer | >=4.6.2, <5.4.2 |
5.4.2 |
Affected products
- vrana adminer
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/vrana/adminer/commit/21d3a3150388677b18647d68aec93b7850e457d3
web, patch
-
github.com
/vrana/adminer/security/advisories/GHSA-q4f2-39gr-45jh
web, exploit, vendor-advisory
-
github.com
/vrana/adminer/releases/tag/v5.4.2
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-25892
advisory
-
github.com
/vrana/adminer
package
Sources
- CVE List CVE-2026-25892
- GitHub Advisory GHSA-q4f2-39gr-45jh
- NVD CVE-2026-25892
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.