EUVD-2026-75417
GHSA-7hv8-vvv8-r6qq
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/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 stored XSS needing a low-priv self-registered account (PR:L) and victim page view (UI:R); execution in the victim's context is a scope change (S:C) enabling admin session actions, so C:H/I:H, no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
WWBN AVideo, in versions up to and including commit c3edcc274c389816d434acadac07ee78eaf330c1, contains a stored cross-site scripting vulnerability. objects/categoryAddNew.json.php passes the POST parameters name and iconClass to Category::setName() and Category::setIconClass(), which store the values without sanitization (setName only truncates to 45 characters). The category name is later echoed as HTML text and iconClass is echoed into a class attribute in view/modeYoutubeBottom.php and in Gallery cards (plugin/Gallery/functions.php). When the CustomizeUser option usersCanCreateNewCategories is enabled, any authenticated user with canUpload permission (granted by default via self-registration) can create a category containing a JavaScript payload; the payload then executes in the browser of any visitor, including administrators, who views a watch page or gallery entry for a video assigned to that category, allowing actions such as authenticated requests with the victim's session. The issue was unpatched at the time of reporting.
Articles & Coverage 1
AnalysisAI
Stored cross-site scripting in WWBN AVideo (all versions up to and including commit c3edcc274c389816d434acadac07ee78eaf330c1) lets a low-privileged, self-registered user plant a persistent JavaScript payload through video category creation. The unsanitized name and iconClass POST parameters in objects/categoryAddNew.json.php are later rendered into HTML text and a class attribute on watch pages and Gallery cards, so the payload executes in the browser of any visitor - including administrators - enabling session-riding authenticated requests. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the CustomizeUser option usersCanCreateNewCategories to be enabled AND an authenticated account with canUpload permission - obtainable by default through self-registration. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-supplied CVSS 4.0 vector (9.3, AV:N/AC:L/PR:L/UI:P/VC:H/VI:H/SC:H/SI:H) matches the described mechanics: network-reachable, low attacker privilege, and passive victim interaction (viewing a page), with a security-context change into the victim's session that plausibly reaches an administrator. … 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 - the issue was reported unpatched, so track GHSA-283q-fq8j-mhv8 (https://github.com/WWBN/AVideo/security/advisories/GHSA-283q-fq8j-mhv8) for a fixed release and upgrade as soon as one is published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all WWBN AVideo deployments, audit existing category names and iconClass parameters for suspicious content, and immediately restrict video category creation to administrator-only access. …
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External POC / Exploit Code
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