PT-2021-20635 · WordPress · Calendar Plugin

P7E4 · Published 2021-08-16 · Updated 2021-08-24 · CVE-2021-34667

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: Calendar plugin WordPress plugin versions up to and including 1.0

Description: The issue arises from the use of $ SERVER['PHP SELF'] in the ~/calendar.php file, allowing attackers to inject arbitrary web scripts. This enables Reflected Cross-Site Scripting attacks.

Recommendations: For Calendar plugin WordPress plugin versions up to and including 1.0, update to a version that fixes this issue, as the current version allows for the injection of arbitrary web scripts. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-34667

Affected Products

Calendar Plugin

References · 4

• 🔥 https://wordfence.com/vulnerability-advisories/#CVE-2021-34667 · Exploit
• 🔥 https://plugins.trac.wordpress.org/browser/calendar-plugin/trunk/calendar.php#L86 · Exploit
• https://osv.dev/vulnerability/CVE-2021-34667 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34667 · Security Note