EUVD-2026-65203
GHSA-34q8-53jm-qc2r
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Unauthenticated network-reachable login form (AV:N/PR:N/UI:N); straightforward DSN injection yields full code execution (C/I/A:H); scope unchanged as code runs within the web app's own context.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Remote code execution in Adminer before 5.4.3 (the single-file PHP database management tool) allows unauthenticated attackers to inject ODBC connection parameters through the unsanitized server field of the login form. Because the server value is placed directly into a PDO DSN string for MSSQL/ODBC connections, an attacker can smuggle TraceFile and TraceOn parameters via semicolons to write attacker-controlled PHP into the web root, which executes when the trace file is requested. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an Adminer instance older than 5.4.3 that is reachable by the attacker AND whose PHP runtime has the PDO_ODBC driver available, because the injection occurs specifically in the MSSQL/ODBC DSN construction path - an install limited to MySQL/PostgreSQL/SQLite does not expose this vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are internally consistent and point to genuine high priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade to Adminer 5.4.3 or later, which sanitizes the server field before building the PDO DSN. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Adminer, identify those with versions prior to 5.4.3, and immediately disable or isolate these instances from untrusted networks. …
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External POC / Exploit Code
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