What is CVE-2018-18733?

CVE-2018-18733 is a medium-severity vulnerability in Catfish-Cms Catfish Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-10-29.

How severe is CVE-2018-18733?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Catfish-Cms Catfish Cms

CVE-2018-18733

An XSS issue was discovered in Catfish CMS 4.8.30, related to "write source code," a similar issue to CVE-2018-13999.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (42.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Catfish-Cms Catfish Cms — versions 4.8.30

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/AvaterXXX/catfish/blob/master/catfishcms.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18733?: CVE-2018-18733 is a medium-severity vulnerability in Catfish-Cms Catfish Cms, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-10-29.
How severe is CVE-2018-18733?: Medium severity. CVSS v3 base score is 5.4 out of 10.