What is CVE-2020-18917?

CVE-2020-18917 is a high-severity vulnerability in Dedecms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-08-24.

How severe is CVE-2020-18917?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2020-18917 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

CSRF in Dedecms

CVE-2020-18917

The plus/search.php component in DedeCMS 5.7 SP2 allows remote attackers to execute arbitrary PHP code via the typename parameter because the contents of typename.inc are under an attacker's control.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-08-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Dedecms — versions 5.7

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

Public proof-of-concept exploits

References

tusk1.cn/2019/05/12/DeDecms-v5-7-sp2-CRSF-文件操作-前台getshell/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-18917?: CVE-2020-18917 is a high-severity vulnerability in Dedecms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2021-08-24.
How severe is CVE-2020-18917?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2020-18917 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.