PT-2021-22058 · WordPress · Simple Matted Thumbnails

P7E4 · Published 2021-09-10 · Updated 2021-09-15 · CVE-2021-38339

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 Matted Thumbnails WordPress plugin versions up to and including 1.01

Description The issue concerns a Reflected Cross-Site Scripting vulnerability due to a reflected $ SERVER["PHP SELF"] value in the ~/simple-matted-thumbnail.php file. This allows attackers to inject arbitrary web scripts.

Recommendations For versions up to and including 1.01, update to a version that fixes this issue. As a temporary workaround, consider restricting access to the ~/simple-matted-thumbnail.php file to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-38339

Affected Products

Simple Matted Thumbnails

References · 5

• 🔥 https://plugins.trac.wordpress.org/browser/simple-matted-thumbnails/tags/1.01/simple-matted-thumbnail.php#L122 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-38339 · Security Note
• https://osv.dev/vulnerability/CVE-2021-38339 · Vendor Advisory
• https://t.me/cibsecurity/28667 · Telegram Post
• https://wordfence.com/vulnerability-advisories/#CVE-2021-38339 · Note