AVideo before 29.1.0 contains a stored cross-site scripting vulnerability in the video trailer1 field rendered unsanitized within an inline onclick JavaScript string. Attackers with video upload permission can store HTML entity-encoded payloads that bypass isValidURL() validation and are decoded by the browser to break out of the JavaScript string, executing arbitrary code in any visitor's session including administrators.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Wwbn Avideo
cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*
|
— |
<= 29.1.1
|
References 3
https://github.com/WWBN/AVideo/security/advisories/GHSA-v7vx-v9q9-qhw3
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/avideo-stored-xss-via-html-entity-bypass-i…
disclosure@vulncheck.com
https://github.com/WWBN/AVideo/commit/40b3267760924389c626a549bb1c6fd013b3b29c
disclosure@vulncheck.com