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Fencer Intel
medium 4.3

CVE-2010-1330 json

Cross-site Scripting in in JRuby

published 13y ago modified 4mo ago also GHSA-wmq2-jc9m-xp4m , EUVD-2022-5601

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

The regular expression engine in JRuby before 1.4.1, when $KCODE is set to 'u', does not properly handle characters immediately after a UTF-8 character, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted string.

Patch / fix

  • maven org.jruby:jruby-core 1.4.1
  • jruby Debian 14, Debian 13, Debian 12 1.5.0~rc1-1

debian advisories DEBIAN-CVE-2010-1330

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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-2010-1330 updated cvss 5.0

jruby: XSS in the regular expression engine when processing invalid UTF-8 byte sequences

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

2.22% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • jruby.org http://www.jruby.org/2010/04/26/jruby-1-4-1-xss-vulnerability.html referenced PoC, tagged "exploit" by a source, unverified

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
maven org.jruby:jruby-core
<1.4.1
1.4.1

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.