CVE-2020-27388

Name: CVE-2020-27388
Creator: NVD / NIST
Published: 2020-10-23T20:15:12.003+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.75%

Last modified Jun 17, 2026

CVE-2020-27388 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Multiple Stored Cross Site Scripting (XSS) vulnerabilities exist in the YOURLS Admin Panel, Versions 1.5 - 1.7.10. An authenticated user must modify a PHP plugin with a malicious payload and upload it, resulting in multiple stored XSS issues.. EPSS estimates a 0.75% chance of exploitation in the next 30 days.

Description

Multiple Stored Cross Site Scripting (XSS) vulnerabilities exist in the YOURLS Admin Panel, Versions 1.5 - 1.7.10. An authenticated user must modify a PHP plugin with a malicious payload and upload it, resulting in multiple stored XSS issues.

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

0.75%

50.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Yourls	Yourls	>= 1.5, <= 1.7.10

References

http://yourls.comProduct
https://github.com/YOURLS/YOURLS/pull/2761Third Party Advisory
https://johnjhacking.com/blog/cve-2020-27388/Third Party Advisory
http://yourls.comProduct
https://github.com/YOURLS/YOURLS/pull/2761Third Party Advisory
https://johnjhacking.com/blog/cve-2020-27388/Third Party Advisory

Timeline

Published: Oct 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27388?

How severe is CVE-2020-27388?

CVE-2020-27388 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.75% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27388?

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-2020-27388?

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

Scan your code now

Source: NVD / NIST