PT-2021-16119 · WordPress · Availability Calendar Wordpress Plugin

[e-mail] Inc · Published 2021-09-20 · Updated 2021-10-02 · CVE-2021-24604

Positive Technologies (AI Summary)

CVSS v3.1

4.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Availability Calendar WordPress plugin versions prior to 1.2.2

Description The issue allows high privilege users to perform Cross-Site Scripting attacks due to the lack of sanitization or escaping of Category Names before outputting them in pages or posts where the associated shortcode is embedded. This is possible even when the unfiltered html is disallowed.

Recommendations For versions prior to 1.2.2, update to version 1.2.2 or later to resolve the issue. As a temporary workaround, consider restricting the use of the Category Names feature in the Availability Calendar WordPress plugin until a patch is available.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-24604

Affected Products

Availability Calendar Wordpress Plugin

References · 7

• 🔥❌ https://github.com/AlAIAL90/CVE-2021-24604 · Exploit, Deleted
• 🔥 https://wpscan.com/vulnerability/d084c5b1-45f1-4e7e-b3e9-3c98ae4bce9c · Exploit
• https://osv.dev/vulnerability/CVE-2021-24604 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-24604 · Security Note
• https://t.me/cybersecuritytechnologies/4427 · Telegram Post
• https://t.me/cibsecurity/29085 · Telegram Post
• https://t.me/cvenotify/21153 · Telegram Post