Vulnerability in Vrana Adminer
CVE-2026-56706
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/vrana/adminer/security/advisories/GHSA-33j4-hc95-pggg (vendor-advisory)
- www.vulncheck.com/advisories/adminer-before-csrf-token-secret-recovery-via-xor-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56706?
- CVE-2026-56706 is a medium-severity vulnerability in Vrana Adminer, classified under Use of Insufficiently Random Values. CVSS score: 6.8/10. Published 2026-08-25.
- How severe is CVE-2026-56706?
- Medium severity. CVSS v3 base score is 6.8 out of 10.