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)
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 (46.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% 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
- Custom Content Shortcode Project
- Custom Content Shortcode — versions 4.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/e247d78a-7243-486c-a017-7471a8dcb800 (Exploit, Third Party Advisory)
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.