Vulnerability · Published Aug 20, 2026 · Assigned by VulDB

CVE-2026-76800DeDeCMS select_media_post.php unrestricted upload

Medium 6.3

In plain English

A medium-severity unrestricted file upload in DeDeCMS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.3%top 71.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A flaw has been found in DeDeCMS 3. Affected by this vulnerability is an unknown functionality of the file /include/dialog/select_media_post.php. Executing a manipulation of the argument uploadfile can lead to unrestricted upload. The attack can be executed remotely. The exploit has been published and may be used.

Affected products (as reported)

Vendor	Product	Versions
n/a	DeDeCMS	3

Weakness: CWE-434, CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-393317 | DeDeCMS select_media_post.php unrestricted upload vdb-entry, technical-description
VDB-393317 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-76800 | CVE Analysis and Report third-party-advisory
Submit #880081 | https://www.dedecms.com/ DeDeCMS v3 Unrestricted Upload third-party-advisory
https://uvxbywu62qm.feishu.cn/wiki/TKqDwJGYaiBVXpk3EtFcdjRDnsg?from=from_copylink exploit