How severe is CVE-2026-25892?

CVE-2026-25892 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-25892 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25892?

CVE-2026-25892 affects Adminer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25892?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25892 have an EU (EUVD) identifier?

Yes. CVE-2026-25892 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6870.

When was CVE-2026-25892 published?

CVE-2026-25892 was published on 2026-02-09 and last updated on 2026-06-17.

CVE-2026-25892

CVE-2026-25892 is a high-severity vulnerability in Adminer with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6870
Weakness: CWE-20
Affected product: Adminer
Published: 2026-02-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-25892?: 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.
How severe is CVE-2026-25892?: CVE-2026-25892 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-25892 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25892?: CVE-2026-25892 affects Adminer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25892?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25892 have an EU (EUVD) identifier?: Yes. CVE-2026-25892 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6870.
When was CVE-2026-25892 published?: CVE-2026-25892 was published on 2026-02-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*

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