YUI vulnerabilitiesYUI: known vulnerabilities and safe versions
npm: yui
YUI has 11 known vulnerability records: 4 in the npm advisory data (GitHub Advisory Database via OSV, the same source npm audit uses) and 7 only in Retire.js (CDN builds and advisories without a CVE).
By branch: 3.x is safe from 3.10.13; 2.x has no fixed release in the records.
Vulnerabilities and safe version by branch
Safe version: on that branch, this release and every later one (up to the branch's latest release, where known) fall outside every known record's range. Candidates are only the records' own fixed versions and the branch's latest release; "No fix" means moving off the branch.
| Branch | Support | Latest on branch | Records | Safe version |
|---|---|---|---|---|
| 3.x | — | — | 4medium | 3.10.13 |
| 2.x | — | — | 8medium | No fix |
Support dates appear only for libraries that endoflife.date tracks.
Records
Newest first. Ranges are the record's own data; several ranges mean separate fixes per branch.
CVE-2013-49422013-07-29
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
Affected versions: >= 3.2.0, <= 3.9.1 · >= 3.2.0, < 3.9.2
medium 4.3
Fixed in: 3.9.2
EPSS 1.1%
CVE-2013-49412013-07-29
Cross-site scripting (XSS) vulnerability in uploader.swf in the Uploader component in Yahoo! YUI 3.2.0 through 3.9.1, as used in Moodle thro
Affected versions: >= 3.2.0, <= 3.9.1 · >= 3.2.0, < 3.9.2
medium 4.3
Fixed in: 3.9.2
EPSS 1.1%
CVE-2013-49402013-07-29
Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo! YUI 3.10.2, as used in Moodle through 2.1.10, 2.2.x
Affected versions: >= 3.0.0, < 3.10.11 · >= 3.10.12, < 3.10.13
medium 4.3
Fixed in: 3.10.11, 3.10.13
EPSS 1.4%
CVE-2013-49392013-07-29
Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo! YUI 3.0.0 through 3.9.1, as used in Moodle through
Affected versions: < 3.10.3 · >= 3.0.0, < 3.10.3
medium 4.3
Fixed in: 3.10.3
EPSS 1.4%
CVE-2012-58832012-11-16
Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.8.0 through 2.9.0, as used in Bugzilla 3.7.x and 4.0
Affected versions: >= 2.8.0, < 2.9.1
medium 4.3
Fixed in: 2.9.1
EPSS 2.1%
CVE-2012-58822012-11-16
Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.5.0 through 2.9.0 allows remote attackers to inject
Affected versions: >= 2.5.0, < 2.9.1
medium 4.3
Fixed in: 2.9.1
EPSS 2.4%
CVE-2012-58812012-11-16
Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.4.0 through 2.9.0 allows remote attackers to inject
Affected versions: >= 2.4.0, < 2.9.1
medium 4.3
Fixed in: 2.9.1
EPSS 2.4%
CVE-2010-47102011-01-28
Cross-site scripting (XSS) vulnerability in the addItem method in the Menu widget in YUI before 2.9.0 allows remote attackers to inject arbi
Affected versions: < 2.9.0
medium 4.3
Fixed in: 2.9.0
EPSS 2.2%
CVE-2010-42092010-11-07
Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.8.0 through 2.8.1, as used in Bugzilla 3.7.1 through
Affected versions: >= 2.8.0, < 2.8.2
medium 4.3
Fixed in: 2.8.2
EPSS 4.9%
CVE-2010-42082010-11-07
Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.5.0 through 2.8.1, as used in Bugzilla, Moodle, and
Affected versions: >= 2.5.0, < 2.8.2
medium 4.3
Fixed in: 2.8.2
EPSS 5.1%
CVE-2010-42072010-11-07
Cross-site scripting (XSS) vulnerability in the Flash component infrastructure in YUI 2.4.0 through 2.8.1, as used in Bugzilla, Moodle, and
Affected versions: >= 2.4.0, < 2.8.2
medium 4.3
Fixed in: 2.8.2
EPSS 5.1%
Sources and method
Ranges: GitHub Advisory Database (OSV npm export, daily) and Retire.js (Apache-2.0). Exploitation: CISA KEV, FIRST EPSS and exploit maturity from the Noroxi CVE database. Support dates: endoflife.date.
This page and the JavaScript library scan use the same matching rule: a row without bounds is not evidence, and versions are compared in one place. A record without a version range never counts as "affected" in the version check.
Data as of October 22, 2026.