Vulnerability in Wwbn Avideo
CVE-2026-82644
WWBN AVideo (current e01e41ecc and earlier) contains a brute-force rate limiting bypass in enforceRateLimit(), which protects login.json.php and 13 other endpoints. The function stores its attempt counter via a cache layer (ObjectYPT::setCacheGlobal) that silently discards writes for any client identified as a bot by isBot(). Because isBot() treats a missing User-Agent header as a bot by default — and also matches common bot identifiers such as 'curl', 'bot', 'crawler', and 'spider' — the counter never increments for such clients, so the rate limit never fires. An unauthenticated attacker can therefore submit unlimited login attempts (e.g., by omitting the User-Agent header or using curl's default User-Agent), enabling unrestricted password-guessing attacks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (37.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.4% 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: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-6893-mcgv-9p2x (vendor-advisory)
- www.vulncheck.com/advisories/wwbn-avideo-brute-force-rate-limiting-bypass-via-m… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82644?
- CVE-2026-82644 is a high-severity vulnerability in Wwbn Avideo, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 7.5/10. Published 2026-08-30.
- How severe is CVE-2026-82644?
- High severity. CVSS v3 base score is 7.5 out of 10.