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Fencer Intel
medium 4.3

CVE-2013-4942 json

YUI Cross-site Scripting (XSS) vulnerability

published 13y ago modified 4mo ago also GHSA-9ww8-j8j2-3788 , EUVD-2013-4786

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist moodle/moodle 2.2.11, 2.3.8, 2.4.5, 2.5.1

Is CVE-2013-4942 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-4942 updated cvss 4.3

moodle: upstream 2.5.1, 2.4.5, 2.3.8, 2.2.11 security fixes

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected packages

ecosystem package affected fixed in
npm yui
>=3.2.0, <=3.9.1
 no fix listed
packagist moodle/moodle
<2.2.11
>=2.3.0, <2.3.8
>=2.4.0-rc1, <2.4.5
>=2.5.0-beta, <2.5.1
2.2.11
2.3.8
2.4.5
2.5.1

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.