PT-2026-27447 · Dedecms · Dedecms

Peng Wu · Published 2026-03-24 · Updated 2026-03-24 · CVE-2026-29839

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions DedeCMS version 5.7.118

Description The software contains a Cross-Site Request Forgery (CSRF) issue in the /sys task add.php file. A Cross-Site Request Forgery attack allows an attacker to induce a user to perform unwanted actions on a web application in which they’re currently authenticated. The vulnerable file is /sys task add.php.

Recommendations Update to a newer version of DedeCMS that addresses this issue. As a temporary workaround, consider implementing CSRF protection mechanisms for the /sys task add.php endpoint.

Fix

CSRF

Weakness Enumeration

CWE-352

Related Identifiers

CVE-2026-29839

Affected Products

Dedecms

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-29839 · Security Note
• https://twitter.com/TheHackerWire/status/2036536808595660898 · Twitter Post
• https://gist.github.com/w-p-man/43bfdf3c7cf889981d773d1276bb6a62 · Note
• https://twitter.com/TheHackerWire/status/2036548130494357634 · Twitter Post
• https://dedecms.com · Note
• https://twitter.com/TheHackerWire/status/2036536659723034996 · Twitter Post