Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking

Description

Adminer before 5.4.3 uses a CSRF token scheme that transmits both the XOR mask and the masked value in every token (format (rand XOR secret):rand), allowing anyone who observes a single CSRF token (e.g., via network sniffing, log files, Referrer header, or XSS) to recover the session secret with a single XOR operation and forge unlimited valid tokens. The implementation is further weakened by a low-entropy session token (rand(1,1e6), ~20 bits) that permits blind brute-force, and by use of loose comparison (==) in token verification, enabling PHP type juggling. Exploitation enables cross-site request forgery against authenticated sessions, including execution of arbitrary SQL queries.

Scores

EPSS (exploitation in 30 days)

0.41% · top 64% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.

Weakness

• CWE-330: Use of Insufficiently Random Values (opens in a new tab)All about CWE-330 and its CVEs

Affected products

• vrana · adminer

  • affected < 5.4.3
  • unaffected 5.4.3

References (2)

• GitHub Security Advisory (GHSA-33j4-hc95-pggg) (opens in a new tab)vendor-advisoryexploit
• VulnCheck Advisory: Adminer before 5.4.3 CSRF Token Secret Recovery via XOR Masking (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-56706](https://trackcve.app/badge/CVE-2026-56706.svg)](https://trackcve.app/cve/CVE-2026-56706)

Record last updated 25 Aug 2026, 15:34 UTC.