YUI Cross-site Scripting (XSS) vulnerability

Description

Cross-site scripting (XSS) vulnerability in flashuploader.swf in the Uploader component in Yahoo! YUI 3.5.0 through 3.9.1, as used in Moodle through 2.1.10, 2.2.x before 2.2.11, 2.3.x before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.1, and other products, allows remote attackers to inject arbitrary web script or HTML via a crafted string in a URL.

Recommendation

No fix is available yet. Followings are affected versions:

>= 3.2.0, <= 3.9.1

References

GHSA-9ww8-j8j2-3788
moodle.org
git.moodle.org
web.archive.org
CVE-2013-4942
CWE-79
CAPEC-310
OWASP 2021-A3
OWASP 2021-A6

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Related Issues

YUI Cross-site Scripting (XSS) vulnerability - yui - CVE-2013-4941
YUI Cross-site Scripting (XSS) vulnerability - yui - GHSA-x5hj-47vv-53p8 - CVE-2013-4940
TinyMCE Cross-Site Scripting (XSS) vulnerability using through data-mce- prefixed src, href, style attributes - CVE-2026-47759
Vuetify has a Cross-site Scripting (XSS) vulnerability in the VDatePicker component - CVE-2025-8082

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