CVE-2015-1840

Name: CVE-2015-1840
Creator: NVD / NIST
Published: 2015-07-26T22:59:00.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.52%

Last modified Jun 17, 2026

CVE-2015-1840 is a vulnerability of currently unknown severity. jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x and 4.x, allow remote attackers to bypass the Same Origin Policy, and trigger transmission of a CSRF token to a different-domain web server, via a leading space character in a URL within an attribute value.. EPSS estimates a 4.52% chance of exploitation in the next 30 days.

Description

jquery_ujs.js in jquery-rails before 3.1.3 and 4.x before 4.0.4 and rails.js in jquery-ujs before 1.0.4, as used with Ruby on Rails 3.x and 4.x, allow remote attackers to bypass the Same Origin Policy, and trigger transmission of a CSRF token to a different-domain web server, via a leading space character in a URL within an attribute value.

Metrics

EPSS Probability

4.52%

90.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Fedoraproject	Fedora	21
Fedoraproject	Fedora	22
Rubyonrails	Jquery-Rails	<= 3.1.2
Rubyonrails	Jquery-Rails	4.0.0
Rubyonrails	Jquery-Rails	4.0.1
Rubyonrails	Jquery-Ujs	<= 1.0.3
Opensuse	Opensuse	13.1
Opensuse	Opensuse	13.2

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160906.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161043.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-07/msg00041.htmlThird Party Advisory
http://openwall.com/lists/oss-security/2015/06/16/15
http://www.securityfocus.com/bid/75239
https://github.com/rails/jquery-rails/blob/master/CHANGELOG.mdVendor Advisory
https://github.com/rails/jquery-ujs/blob/master/CHANGELOG.mdVendor Advisory
https://groups.google.com/forum/message/raw?msg=rubyonrails-security/XIZPbobuwaY/fqnzzpuOlA4JExploit, Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160906.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161043.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-07/msg00041.htmlThird Party Advisory
http://openwall.com/lists/oss-security/2015/06/16/15
http://www.securityfocus.com/bid/75239
https://github.com/rails/jquery-rails/blob/master/CHANGELOG.mdVendor Advisory
https://github.com/rails/jquery-ujs/blob/master/CHANGELOG.mdVendor Advisory
https://groups.google.com/forum/message/raw?msg=rubyonrails-security/XIZPbobuwaY/fqnzzpuOlA4JExploit, Vendor Advisory

Timeline

Published: Jul 26, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-1840?

How severe is CVE-2015-1840?

Severity scoring for CVE-2015-1840 is pending analysis. The EPSS model estimates a 4.52% probability of exploitation in the next 30 days.

How do I fix CVE-2015-1840?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-1840?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST