CVE-2020-23370

Name: CVE-2020-23370
Creator: NVD / NIST
Published: 2021-05-10T23:15:07.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2020-23370 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. In YzmCMS 5.6, stored XSS exists via the common/static/plugin/ueditor/1.4.3.3/php/controller.php action parameter, which allows remote attackers to upload a swf file. The swf file can be injected with arbitrary web script or HTML.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

In YzmCMS 5.6, stored XSS exists via the common/static/plugin/ueditor/1.4.3.3/php/controller.php action parameter, which allows remote attackers to upload a swf file. The swf file can be injected with arbitrary web script or HTML.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.73%

49.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Yzmcms	Yzmcms	5.6

References

https://github.com/yzmcms/yzmcms/issues/45Exploit, Third Party Advisory
https://github.com/yzmcms/yzmcms/issues/45Exploit, Third Party Advisory

Timeline

Published: May 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-23370?

How severe is CVE-2020-23370?

CVE-2020-23370 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2020-23370?

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-2020-23370?

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

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Source: NVD / NIST