by Kastro
Paper/Archive/CVE-2026-56705

CVE-2026-56705

vrana adminer — Adminer before 5.4.3 Remote Code Execution via MSSQL PDO DSN Injection

EPSS 0.9%public exploitCVSS 9.8
critical.is priorityof 100
51
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 59.5.595 × 2011.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Adminer before 5.4.3 fails to sanitize the server field before constructing a PDO DSN string, allowing unauthenticated attackers to inject ODBC parameters via semicolons. Attackers can inject TraceFile and TraceOn parameters to write PHP code to the web root, achieving remote code execution when the trace file is accessed.

Affected

ProductAffectedFixed inSource
adminer< 5.4.35.4.3CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/vrana/adminer/security/advisories/GHSA-r4x9-5m63-3vxwwriteupvulncheck.com/advisories/adminer-before-remote-code-execution-via-mssql-pdo-dsn-injection