What is CVE-2023-45555?

CVE-2023-45555 is a high-severity vulnerability in Zzzcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.8/10. Published 2023-10-25.

How severe is CVE-2023-45555?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2023-45555 known to be exploited?

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

Arbitrary file upload in Zzzcms

CVE-2023-45555

File Upload vulnerability in zzzCMS v.2.1.9 allows a remote attacker to execute arbitrary code via a crafted file to the down_url function in zzz.php file.

Vulnerability class: Unrestricted File Upload

Published 2023-10-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Zzzcms — versions 2.1.9

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

tanjiti/sec_

References

github.com/96xiaopang/Vulnerabilities/blob/main/zzzcms任意文件上传_en.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-45555?: CVE-2023-45555 is a high-severity vulnerability in Zzzcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.8/10. Published 2023-10-25.
How severe is CVE-2023-45555?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-45555 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.