What is CVE-2018-20778?

CVE-2018-20778 is a medium-severity vulnerability in Frog Cms Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-02-11.

How severe is CVE-2018-20778?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Frog Cms Project

CVE-2018-20778

admin/?/plugin/file_manager in Frog CMS 0.9.5 allows XSS by creating a new file containing a crafted attribute of an IMG element.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-02-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.9% 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

Frog Cms Project — versions 0.9.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/philippe/FrogCMS/issues/28 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-20778?: CVE-2018-20778 is a medium-severity vulnerability in Frog Cms Project, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-02-11.
How severe is CVE-2018-20778?: Medium severity. CVSS v3 base score is 6.1 out of 10.