Home/CVE/Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo! YUI 3.0.0 through 3.9.1, as use
CVE

CVE-2013-4939

Cross-site scripting (XSS) vulnerability in io.swf in the IO Utility component in Yahoo! YUI 3.0.0 through 3.9.1, as use

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 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.

MEDIUM · CVSS 4.3 EPSS 0.0031
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

2
moodleall versions
yahoo yuiall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm yui MODERATE fixed in 3.10.3
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v2 (legacy) · cve@mitre.org
View on NVD
This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.
v2 Vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Published to NVD29 Jul 2013 · 01:59 PM
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-39678
http://yuilibrary.com/support/20130515-vulnerability/PatchVendor Advisory
https://lists.apache.org/thread.html/72837f969cdf9b63a7e7337edd069fa3b3950eea7c997cc2ff61aa0c%40%3Cissues.zookeeper.apache.org%3E
https://lists.apache.org/thread.html/d8b9403dbab85a51255614949938b619bd03b1c944c76c48c6996a0e%40%3Cdev.zookeeper.apache.org%3E
https://moodle.org/mod/forum/discuss.php?d=232496Vendor Advisory
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