DedeCMS before 5.7 contains a file inclusion vulnerability in plus/carbuyaction.php that allows remote unauthenticated attackers to control the include path by manipulating the uninitialized code parameter passed to require_once. Attackers can supply path traversal sequences ../../ to include arbitrary local files outside the intended payment directory, potentially achieving local file disclosure. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-18.
https://www.vulncheck.com/advisories/dedecms-file-inclusion-via-plus-carbuyaction-php
https://www.cnblogs.com/milantgh/p/3615986.html
https://web.archive.org/web/20100630011301/https://www.myhack58.com/Article/html/3/62/2010/27387.htm
https://github.com/dedecms/DedeCMS/releases/tag/v5.7
https://github.com/dedecms/DedeCMS/blob/v5.6/plus/carbuyaction.php
Published: 2026-10-30
Updated: 2026-10-30
Base Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N
Severity: High
Base Score: 7.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Severity: High
Base Score: 8.7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Severity: High
EPSS: 0.00553