PT-2021-20634 · WordPress · Add Sidebar Wordpress Plugin

P7E4 · Published 2021-08-16 · Updated 2021-08-24 · CVE-2021-34666

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions: Add Sidebar WordPress plugin versions up to and including 2.0.0

Description: The issue allows attackers to inject arbitrary web scripts via the add parameter in the ~/wp sidebarMenu.php file, enabling Reflected Cross-Site Scripting attacks.

Recommendations: For versions up to and including 2.0.0, consider disabling access to the ~/wp sidebarMenu.php file or restricting the use of the add parameter until a patch is available.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-34666

Affected Products

Add Sidebar Wordpress Plugin

References · 5

• 🔥 https://plugins.trac.wordpress.org/browser/sidebar-adder/tags/2.0.1/wp_sidebarMenu.php#L124 · Exploit
• 🔥 https://wordfence.com/vulnerability-advisories/#CVE-2021-34666 · Exploit
• https://osv.dev/vulnerability/CVE-2021-34666 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34666 · Security Note
• https://t.me/cibsecurity/27411 · Telegram Post