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.

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)

EPSS: 0.006 (44.1th percentile) — read the EPSS interpretation.

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.

Affected products

Youtube_embed_project Youtube_embed
Unknown Youtube Embed — versions 5.2.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)

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.