CVE-2023-4520: XSS
First published: Fri Aug 25 2023(Updated: )
The FV Flowplayer Video Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘_fv_player_user_video’ parameter saved via the 'save' function hooked via init, and the plugin is also vulnerable to Arbitrary Usermeta Update via the 'save' function in versions up to, and including, 7.5.37.7212 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page, and makes it possible to update the user metas arbitrarily, but the meta value can only be a string.
Credit: security@wordfence.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Flowplayer | <=7.5.37.7212 |
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Reference Links
- https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/tags/7.5.36.7212/models/custom-videos.php#L341
- https://plugins.trac.wordpress.org/changeset/2957322/fv-wordpress-flowplayer#file2
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c55ca7d4-6bc0-49c9-8ce0-50fff8775a76?source=cve
Frequently Asked Questions
What is CVE-2023-4520?
CVE-2023-4520 is a vulnerability in the FV Flowplayer Video Player plugin for WordPress that allows stored cross-site scripting (XSS) attacks and arbitrary usermeta updates.
How does CVE-2023-4520 affect the FV Flowplayer Video Player plugin?
CVE-2023-4520 allows attackers to perform stored cross-site scripting attacks and arbitrary usermeta updates in the FV Flowplayer Video Player plugin for WordPress.
What is the severity of CVE-2023-4520?
The severity of CVE-2023-4520 is medium with a CVSS score of 6.1.
How can I fix CVE-2023-4520?
To fix CVE-2023-4520, update the FV Flowplayer Video Player plugin for WordPress to version 7.5.38 or later.
Where can I find more information about CVE-2023-4520?
More information about CVE-2023-4520 can be found at the following references: [link1](https://plugins.trac.wordpress.org/browser/fv-wordpress-flowplayer/tags/7.5.36.7212/models/custom-videos.php#L341), [link2](https://plugins.trac.wordpress.org/changeset/2957322/fv-wordpress-flowplayer#file2), [link3](https://www.wordfence.com/threat-intel/vulnerabilities/id/c55ca7d4-6bc0-49c9-8ce0-50fff8775a76?source=cve).
- agent/type
- agent/references
- agent/weakness
- agent/remedy
- agent/description
- agent/severity
- agent/first-publish-date
- agent/event
- agent/softwarecombine
- agent/source
- agent/tags
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/last-modified-date
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- vendor/foliovision
- canonical/flowplayer
- version/flowplayer/7.5.37.7212