RCE in Dedecms

CVE-2018-20129

An issue was discovered in DedeCMS V5.7 SP2. uploads/include/dialog/select_images_post.php allows remote attackers to upload and execute arbitrary PHP code via a double extension and a modified ".php" substring, in conjunction with the image/jpeg content type, as demonstrated by the filename=1.jpg.p*hp value.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.082 (94.7th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2018-20129: held from 0.082 to 0.082.

EPSS over last 30 days · oldest: 0.082 · newest: 0.082 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-20129?
CVE-2018-20129 is a high-severity vulnerability in Dedecms, classified under Code Injection. CVSS score: 8.8/10. Published 2018-12-13.
How severe is CVE-2018-20129?
High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2018-20129 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.