What is CVE-2021-24826?

CVE-2021-24826 is a medium-severity vulnerability in Custom Content Shortcode Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-03-07.

How severe is CVE-2021-24826?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2021-24826 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Custom Content Shortcode Project

CVE-2021-24826

The Custom Content Shortcode WordPress plugin before 4.0.2 does not escape custom fields before outputting them, which could allow Contributor+ (v < 4.0.1) or Admin+ (v < 4.0.2) users to perform Cross-Site Scripting attacks even when the unfiltered_html is disallowed. Please note that such attack is still possible by admin+ in single site blogs by default (but won't be when the unfiltered_html is disallowed)

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.006 (45.4th 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

Custom_content_shortcode_project Custom_content_shortcode
Unknown Custom Content Shortcode — versions 4.0.2

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-2021-24826?: CVE-2021-24826 is a medium-severity vulnerability in Custom Content Shortcode Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-03-07.
How severe is CVE-2021-24826?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2021-24826 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.