PT-2021-20626 · WordPress · Simple Popup Newsletter

P7E4 · Published 2021-08-16 · Updated 2021-08-23 · CVE-2021-34658

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: Simple Popup Newsletter WordPress plugin versions up to and including 1.4.7

Description: The issue is related to Reflected Cross-Site Scripting due to the use of $ SERVER['PHP SELF'] in the ~/simple-popup-newsletter.php file, allowing attackers to inject arbitrary web scripts.

Recommendations: For versions up to and including 1.4.7, update to a version later than 1.4.7 to resolve the issue. As a temporary workaround, consider restricting access to the ~/simple-popup-newsletter.php file to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-34658

Affected Products

Simple Popup Newsletter

References · 6

• 🔥 https://plugins.trac.wordpress.org/browser/simple-popup-newsletter/trunk/simple-popup-newsletter.php#L319 · Exploit
• 🔥 https://wordfence.com/vulnerability-advisories/#CVE-2021-34658 · Exploit
• https://osv.dev/vulnerability/CVE-2021-34658 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34658 · Security Note
• https://t.me/cvenotify/19453 · Telegram Post
• https://t.me/cibsecurity/27408 · Telegram Post