XSS in Thememason Popular Brand Icons - Simple
CVE-2021-24503
The Popular Brand Icons – Simple Icons WordPress plugin before 2.7.8 does not sanitise or validate some of its shortcode parameters, such as "color", "size" or "class", allowing users with a role as low as Contributor to set Cross-Site payload in them. A post made by a contributor would still have to be approved by an admin to have the XSS triggered in the frontend, however, higher privilege users, such as editor could exploit this without the need of approval, and even when the blog disallows the unfiltered_html capability.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.006 (47.0th 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
- Thememason Popular_brand_icons_-_simple_icons
- Unknown Popular Brand Icons – Simple — versions 2.7.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- contact@wpscan.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-24503?
- CVE-2021-24503 is a medium-severity vulnerability in Thememason Popular Brand Icons - Simple, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-08-02.
- How severe is CVE-2021-24503?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2021-24503 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.