What is CVE-2018-16633?

CVE-2018-16633 is a medium-severity vulnerability in Pluck-Cms Pluck, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-12-04.

How severe is CVE-2018-16633?

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

Is CVE-2018-16633 known to be exploited?

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

XSS in Pluck-Cms Pluck

CVE-2018-16633

Pluck v4.7.7 allows XSS via the admin.php?action=editpage&page= page title.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-12-04 · 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: 0.006 (45.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Pluck-Cms Pluck — versions 4.7.7

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

0xT11/CVE-POC

References

github.com/security-breachlock/CVE-2018-16633/blob/master/PLUCK_XSS.pdf (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-16633?: CVE-2018-16633 is a medium-severity vulnerability in Pluck-Cms Pluck, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2018-12-04.
How severe is CVE-2018-16633?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2018-16633 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.