XSS in Cloughit Async JavaScript
CVE-2020-36854
The Async JavaScript plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.19.07.14. This is due to missing authorization checks on the aj_steps AJAX aciton along with a lack on sanitization on the settings saved via the function. This makes it possible for authenticated attackers with subscriber level permissions and above to inject malicious web scripts into a page that execute whenever a user accesses that page.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (15.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Cloughit Async Javascript — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2020-36854?
- CVE-2020-36854 is a medium-severity vulnerability in Cloughit Async JavaScript, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-10-18.
- How severe is CVE-2020-36854?
- Medium severity. CVSS v3 base score is 6.4 out of 10.