What is CVE-2023-42398?

CVE-2023-42398 is a critical-severity vulnerability in Zzcms, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2023-09-15.

How severe is CVE-2023-42398?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-42398 known to be exploited?

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

SSRF in Zzcms

CVE-2023-42398

An issue in zzCMS v.2023 allows a remote attacker to execute arbitrary code and obtain sensitive information via the ueditor component in controller.php.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2023-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.017 · change: +0.004

Affected products

Zzcms — versions 2023

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

References

github.com/laterfuture/php-audit/blob/main/CVE-2023-42398——ZZCMS2023 SSRF (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-42398?: CVE-2023-42398 is a critical-severity vulnerability in Zzcms, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2023-09-15.
How severe is CVE-2023-42398?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-42398 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.