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AVideo CVE-2026-85159

| EUVDEUVD-2026-70394 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-09-03 VulnCheck GHSA-gr2c-r9h3-6533
PHP XSS Avideo Wwbn
5.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/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
vuln.today AI
6.1 MEDIUM

Network-delivered reflected XSS requiring victim to click Cancel; scope change as payload executes in victim browser; no confidentiality or integrity impact on the server itself.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

1
Analysis Generated
Sep 03, 2026 - 12:04 vuln.today

DescriptionCVE.org

AVideo through commit c91b5975d contains a reflected cross-site scripting vulnerability in userLogin.php where the cancelUri parameter is echoed in an href attribute after isSafeRedirectURL checks protocol only, not HTML characters. Unauthenticated attackers can inject event handlers via relative URLs with embedded quotes to execute arbitrary JavaScript when users interact with the Cancel button.

AnalysisAI

Reflected cross-site scripting in AVideo's userLogin.php allows unauthenticated network attackers to execute arbitrary JavaScript in a victim's browser by supplying a crafted cancelUri parameter. The isSafeRedirectURL validation function restricts only the URL protocol, leaving HTML metacharacters unchecked; a relative URL containing embedded quotes and event handlers bypasses the check entirely and is reflected verbatim into the href attribute of the Cancel button. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target AVideo instance is network-accessible and running userLogin.php (the standard login page, enabled by default). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 5.3 (Medium) reflects the realistic exploitation barrier: the attack requires user interaction (UI:P - victim must click the Cancel anchor) and achieves only limited confidentiality and integrity impact (VC:L/VI:L). … 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 The primary fix is to apply the patch referenced in the GitHub security advisory GHSA-mw3g-2292-vw4c (https://github.com/WWBN/AVideo/security/advisories/GHSA-mw3g-2292-vw4c). … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-85159 vulnerability details – vuln.today
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