XSS in Add Sidebar
CVE-2021-34666
The Add Sidebar WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the add parameter in the ~/wp_sidebarMenu.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 2.0.0.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.008 (54.9th percentile) — read the EPSS interpretation.
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.
Affected products
- Add Sidebar — versions 2.0.0
- Add_sidebar_project Add_sidebar
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@wordfence.com (Exploit, Third Party Advisory, x_refsource_MISC)
- security@wordfence.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-34666?
- CVE-2021-34666 is a medium-severity vulnerability in Add Sidebar, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-16.
- How severe is CVE-2021-34666?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2021-34666 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.