EUVD-2026-68230
GHSA-4m65-c7fj-mw98
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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
Network-accessible unauthenticated endpoint, no complexity; high confidentiality from account takeover, low integrity from post-auth actions, no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Rate-limiting bypass in WWBN AVideo (through commit e01e41ecc) allows unauthenticated remote attackers to conduct unlimited brute-force attacks against login.json.php and 13 other protected endpoints by exploiting a logic flaw in enforceRateLimit(). The function relies on ObjectYPT::setCacheGlobal to persist per-client attempt counters, but silently discards those writes whenever isBot() classifies the client as a bot - which occurs by default for any request omitting a User-Agent header or using agent strings matching 'curl', 'bot', 'crawler', or 'spider'. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The bypass requires only that the attacking client omit the User-Agent header entirely - the default behavior in some scripting and automation contexts - or send a User-Agent string matching patterns such as 'curl', 'bot', 'crawler', or 'spider'. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N) accurately reflects the near-trivial exploitation conditions: omitting the User-Agent header or using curl's default agent string is a one-line change to any HTTP client, requiring no target-specific knowledge beyond the endpoint URL. … 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 | Consult and apply the fix referenced in the vendor GitHub security advisory at https://github.com/WWBN/AVideo/security/advisories/GHSA-6893-mcgv-9p2x - no specific patched release version was independently confirmed from the input data, so operators should verify the fixed commit or release tag directly from that advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
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