What is CVE-2020-12705?

CVE-2020-12705 is a medium-severity vulnerability in Lepton-Cms Leptoncms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-05-07.

How severe is CVE-2020-12705?

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

XSS in Lepton-Cms Leptoncms

CVE-2020-12705

Multiple cross-site scripting (XSS) vulnerabilities exist in LeptonCMS before 4.6.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-05-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.7th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.7% 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

Lepton-Cms Leptoncms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

lepton-cms.org/posts/important-security-update-141.php (Vendor Advisory)

Frequently asked questions

What is CVE-2020-12705?: CVE-2020-12705 is a medium-severity vulnerability in Lepton-Cms Leptoncms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-05-07.
How severe is CVE-2020-12705?: Medium severity. CVSS v3 base score is 6.1 out of 10.