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Vulnerability record · CVE-2020-27388 · published 23 October 2020

CVE-2020-27388: Yourls cross-site scripting vulnerability

Yourls · Yourls

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.

5.4 CVSS 3.1 Medium EPSS 0.72% · top 48.2% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score, v2 3.5
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
9 Jul 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-14537Yourls type confusion vulnerabilityYOURLS through 1.7.3 is affected by a type juggling vulnerability in the api component that can result in login bypass.EPSS 6.1%8.8CVE-2021-3734Yourls clickjacking vulnerabilityyourls is vulnerable to Improper Restriction of Rendered UI Layers or FramesEPSS 0.40%7.4CVE-2022-0088Yourls cross-site request forgery vulnerabilityCross-Site Request Forgery (CSRF) in GitHub repository yourls/yourls prior to 1.8.3.EPSS 2.0%6.1CVE-2021-3783Yourls cross-site scripting vulnerabilityyourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')EPSS 0.70%5.4CVE-2021-3785Yourls cross-site scripting vulnerabilityyourls is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')EPSS 0.72%5.0CVE-2011-3824Yourls information exposure vulnerabilityYour Own URL Shortener (YOURLS) 1.5 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals the in…EPSS 1.2%4.3CVE-2014-8488Yourls cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in the administrator panel in Yourls 1.7 allows remote attackers to inject arbitrary web script or HTML via …EPSS 1.9%6.1CVE-2026-42897Microsoft Exchange Server XSS enables spoofingMicrosoft Exchange Server and Exchange Server Subscription Edition fail to neutralize input during web page generation, a cross-site scripting flaw (…KEVEPSS 0.52%analysed

Source: NIST National Vulnerability Database (record CVE-2020-27388), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.