Adminer before 5.4.3 inserts unsanitized database server version strings into script tags with valid CSP nonces without proper validation. Attackers controlling a rogue MySQL server can return crafted version strings that break out of the JavaScript context and execute arbitrary code, bypassing Content Security Policy protections.

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Fixes

Solution

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Workaround

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History

Thu, 27 Aug 2026 06:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 25 Aug 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Vrana
Vrana adminer
Vendors & Products Vrana
Vrana adminer

Tue, 25 Aug 2026 02:00:00 +0000

Type Values Removed Values Added
Description Adminer before 5.4.3 inserts unsanitized database server version strings into script tags with valid CSP nonces without proper validation. Attackers controlling a rogue MySQL server can return crafted version strings that break out of the JavaScript context and execute arbitrary code, bypassing Content Security Policy protections.
Title Adminer before 5.4.3 Cross-Site Scripting via MySQL Version String
First Time appeared Adminer
Adminer adminer
Weaknesses CWE-79
CPEs cpe:2.3:a:adminer:adminer:*:*:*:*:*:*:*:*
Vendors & Products Adminer
Adminer adminer
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-26T16:12:57.028Z

Reserved: 2026-06-22T18:48:27.059Z

Link: CVE-2026-56704

cve-icon Vulnrichment

Updated: 2026-08-26T15:58:32.715Z

cve-icon NVD

Status : Received

Published: 2026-08-25T02:16:42.187

Modified: 2026-08-26T17:17:08.143

Link: CVE-2026-56704

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-25T04:00:09Z

Weaknesses