XSS in Boldgrid W3 Total Cache
CVE-2021-24436
The W3 Total Cache WordPress plugin before 2.1.4 was vulnerable to a reflected Cross-Site Scripting (XSS) security vulnerability within the "extension" parameter in the Extensions dashboard, which is output in an attribute without being escaped first. This could allow an attacker, who can convince an authenticated admin into clicking a link, to run malicious JavaScript within the user's web browser, which could lead to full site compromise.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.019 (79.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Boldgrid W3 Total Cache — versions 2.1.4
- Boldgrid W3 Total Cache
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/05988ebb-7378-4a3a-9d2d-30f8f58fe9ef (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24436?
- CVE-2021-24436 is a medium-severity vulnerability in Boldgrid W3 Total Cache, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-07-19.
- How severe is CVE-2021-24436?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-24436 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.