EUVD-2026-81284
GHSA-ghch-wqgj-8mcj
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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
Unauthenticated remote injection (PR:N) but payload fires only when a privileged user views the stats page (UI:R); stored XSS crosses into the victim's session (S:C) with limited C/I impact and no availability effect.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
2DescriptionCVE.org
AVideo through 29.0 (current revision e01e41ecc) contains a stored cross-site scripting vulnerability. The unauthenticated view-counter endpoint objects/videoAddViewCount.json.php reaches VideoStatistic::save(), which writes the caller's User-Agent (via getUserAgentInfo(), which returns unrecognized agent strings verbatim) directly into the app column of the videos_statistics table without invoking the sanitizing setter setApp(); normalizeApp() only truncates the value to 45 characters. The video owner's and administrator's statistics page (view/videoViewsInfo.php) renders this field in a DataTables 1.12.1 column with an unescaped renderer, and DataTables assigns cell content using innerHTML, so attacker-supplied HTML is parsed and executed in the privileged user's authenticated session when the statistics page is viewed. No patched version was available at the time of the advisory.
AnalysisAI
Stored cross-site scripting in AVideo through 29.0 (revision e01e41ecc) allows unauthenticated remote attackers to inject arbitrary HTML/JavaScript into the videos_statistics table via the view-counter endpoint, which is then executed in the session of a video owner or administrator who visits the statistics page. The vulnerability arises because unrecognized User-Agent strings are stored verbatim in the app column without invoking the sanitizing setter, and the DataTables 1.12.1 renderer on view/videoViewsInfo.php uses innerHTML. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Injection requires only that the AVideo instance expose its default unauthenticated view-counter endpoint objects/videoAddViewCount.json.php (present in standard deployments) and that the attacker supply an unrecognized User-Agent string (getUserAgentInfo returns such strings verbatim). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but moderate-priority stored XSS. … 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 | No vendor-released patch identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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