CVE-2020-12707

Name: CVE-2020-12707
Creator: NVD / NIST
Published: 2020-05-07T20:15:12.5+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2020-12707 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. An XSS vulnerability exists in modules/wysiwyg/save.php of LeptonCMS 4.5.0. This can be exploited because the only security measure used against XSS is the stripping of SCRIPT elements. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

An XSS vulnerability exists in modules/wysiwyg/save.php of LeptonCMS 4.5.0. This can be exploited because the only security measure used against XSS is the stripping of SCRIPT elements. A malicious actor can use HTML event handlers to run JavaScript instead of using SCRIPT elements.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.23%

65.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Lepton-Cms	Lepton Cms	4.5.0

References

https://gitlab.com/lepton-cms/LEPTON/-/commit/52215f708395a329c9e17ea33bfc6762d4efccbbPatch, Third Party Advisory
https://gitlab.com/lepton-cms/LEPTON/-/commit/52215f708395a329c9e17ea33bfc6762d4efccbbPatch, Third Party Advisory

Timeline

Published: May 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12707?

How severe is CVE-2020-12707?

CVE-2020-12707 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12707?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-12707?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST