Vulnerability Monitor

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CVE-2015-1840

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.

Security Impact Summary

CVE-2015-1840 is a security vulnerability that . Impacting 4 products from fedoraproject, from rubyonrails, from rubyonrails and 1 other, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2015, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2015-07-26T22:59:00.070

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	fedoraproject	fedora	21	Yes
Operating System	fedoraproject	fedora	22	Yes
Application	rubyonrails	jquery-rails	≤ 3.1.2	Yes
Application	rubyonrails	jquery-rails	4.0.0	Yes
Application	rubyonrails	jquery-rails	4.0.1	Yes
Application	rubyonrails	jquery-ujs	≤ 1.0.3	Yes
Operating System	opensuse	opensuse	13.1	Yes
Operating System	opensuse	opensuse	13.2	Yes

References

http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160906.html Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161043.html Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-updates/2015-07/msg00041.html Third Party Advisory ([email protected])
http://openwall.com/lists/oss-security/2015/06/16/15 ([email protected])
http://www.securityfocus.com/bid/75239 ([email protected])
https://github.com/rails/jquery-rails/blob/master/CHANGELOG.md Vendor Advisory ([email protected])
https://github.com/rails/jquery-ujs/blob/master/CHANGELOG.md Vendor Advisory ([email protected])
https://groups.google.com/forum/message/raw?msg=rubyonrails-security/XIZPbobuwaY/fqnzzpuOlA4J Exploit, Vendor Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/160906.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2015-June/161043.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-updates/2015-07/msg00041.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://openwall.com/lists/oss-security/2015/06/16/15 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/75239 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rails/jquery-rails/blob/master/CHANGELOG.md Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rails/jquery-ujs/blob/master/CHANGELOG.md Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/forum/message/raw?msg=rubyonrails-security/XIZPbobuwaY/fqnzzpuOlA4J Exploit, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For fedoraproject's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.