What is CVE-2019-17131?

CVE-2019-17131 is a medium-severity vulnerability in Vbulletin, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 4.3/10. Published 2019-10-04.

How severe is CVE-2019-17131?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Vbulletin

CVE-2019-17131

vBulletin before 5.5.4 allows clickjacking.

Published 2019-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% 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

Vbulletin

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/44… (Vendor Advisory)

Frequently asked questions

What is CVE-2019-17131?: CVE-2019-17131 is a medium-severity vulnerability in Vbulletin, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 4.3/10. Published 2019-10-04.
How severe is CVE-2019-17131?: Medium severity. CVSS v3 base score is 4.3 out of 10.