XSS in Youtube Embed Project
CVE-2021-24471
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).
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (45.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Youtube Embed Project
- Youtube Embed — versions 5.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/a8ccb09a-9f8c-448f-b2d0-9b01c3a748ac (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24471?
- CVE-2021-24471 is a medium-severity vulnerability in Youtube Embed Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-08-16.
- How severe is CVE-2021-24471?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2021-24471 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.