PT-2021-22530 · WordPress+1 · Underconstruction+2

Published 2021-09-01 · Updated 2021-09-08 · CVE-2021-39320

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: underConstruction plugin versions <= 1.18 for WordPress

Description: The issue allows for a reflected Cross-Site Scripting attack by injecting malicious code in the request path on certain configurations, including Apache+modPHP. This is possible because the plugin echoes out the raw value of PHP SELF in the ucOptions.php file.

Recommendations: For underConstruction plugin versions <= 1.18, consider disabling the plugin until a patch is available to prevent exploitation. Restrict access to the ucOptions.php file to minimize the risk of reflected Cross-Site Scripting attacks. Avoid using the plugin on configurations that include Apache+modPHP to reduce the risk of malicious code injection.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-39320

Affected Products

Apache

Mod Php

Underconstruction

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-39320 · Security Note
• https://osv.dev/vulnerability/CVE-2021-39320 · Vendor Advisory
• https://wpscan.com/vulnerability/49ae1df0-d6d2-4cbb-9a9d-bf3599429875 · Note
• https://t.me/cibsecurity/28172 · Telegram Post
• https://wordfence.com/vulnerability-advisories/#CVE-2021-39320 · Note