CVE-2021-24471
Last modified
CVE-2021-24471 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. The YouTube Embed WordPress plugin before 5.2.2 does not validate, escape or sanitise some of its shortcode attributes, leading to Stored XSS issues by 1. using w, h, controls, cc_lang, color, language, start, stop, or style parameter of youtube shortcode, 2. EPSS estimates a 0.58% chance of exploitation in the next 30 days.
Description
The YouTube Embed WordPress plugin before 5.2.2 does not validate, escape or sanitise some of its shortcode attributes, leading to Stored XSS issues by 1. using w, h, controls, cc_lang, color, language, start, stop, or style parameter of youtube shortcode, 2. by using style, class, rel, target, width, height, or alt parameter of youtube_thumb shortcode, or 3. by embedding a video whose title or description contains XSS payload (if API key is configured).
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Youtube Embed Project | Youtube Embed | < 5.2.2 |
References
- https://wpscan.com/vulnerability/a8ccb09a-9f8c-448f-b2d0-9b01c3a748acExploit, Third Party Advisory
- https://wpscan.com/vulnerability/a8ccb09a-9f8c-448f-b2d0-9b01c3a748acExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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