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Fencer Vulns
medium 4.3

CVE-2009-3009 json

Cross site scripting that affects rails

published 2009-09-08 17 y ago modified 2026-06-16 4 mo ago also GHSA-8qrh-h9m2-5fvf , EUVD-2017-0194

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

Cross-site scripting (XSS) vulnerability in Ruby on Rails 2.x before 2.2.3, and 2.3.x before 2.3.4, allows remote attackers to inject arbitrary web script or HTML by placing malformed Unicode strings into a form helper.

Patch / fix

  • rubygems actionpack 2.2.3, 2.3.4
  • rubygems activesupport 2.2.3, 2.3.4
  • rails Debian 14, Debian 13, Debian 12 2.2.3-1

debian advisories DEBIAN-CVE-2009-3009

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-2009-3009 updated

ruby-activesupport: XSS vulnerability

  • 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

3.02% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

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
rubygems actionpack
>=2.0.0, <2.2.3
>=2.3.0, <2.3.4
2.2.3
2.3.4
rubygems activesupport
>=2.0.0, <2.2.3
>=2.3.0, <2.3.4
2.2.3
2.3.4

Classification

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

References

Sources

Fencer Vulns 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.