XSS in Foliovision Fv Flowplayer Video Player
CVE-2023-4520
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.006 (44.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@wordfence.com (Third Party Advisory)
- security@wordfence.com (Patch)
- security@wordfence.com (Product)
Frequently asked questions
- What is CVE-2023-4520?
- CVE-2023-4520 is a medium-severity vulnerability in Foliovision Fv Flowplayer Video Player, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-08-25.
- How severe is CVE-2023-4520?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2023-4520 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.