DedeCMS through 5.7SP2 allows arbitrary file write in dede/file_manage_control.php via a dede/file_manage_view.php?fmdo=newfile request wit…

published 2018-06-08 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-4029

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 61%
public exploits: 0; none known

DedeCMS through 5.7SP2 allows arbitrary file write in dede/file_manage_control.php via a dede/file_manage_view.php?fmdo=newfile request with name and str parameters, as demonstrated by writing to a new .php file.

Patch / fix

fixed in 1

dedecms dedecms 5.7

Exploit prediction

0.97% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/SukaraLin/php_code_audit_project/blob/master/dedecms/dedecms%20v5.7%20sp2%20%E4%BB%A3%E7%A0%81%E5%AE%A1%E8%AE%A1.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-20 Improper Input Validation

References

github.com /SukaraLin/php_code_audit_project/blob/master/dedecms/dedecms%20v5.7%20sp2%20%E4%BB%A3%E7%A0%81%E5%AE%A1%E8%AE
exploit, third-party-advisory

Sources

CVE List CVE-2018-12046
NVD CVE-2018-12046

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary