Vulnerability CVE-2015-2963
Published: 2015-07-10

Description:
The thoughtbot paperclip gem before 4.2.2 for Ruby does not consider the content-type value during media-type validation, which allows remote attackers to upload HTML documents and conduct cross-site scripting (XSS) attacks via a spoofed value, as demonstrated by image/jpeg.

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Thoughtbot -> Paperclip 

 References:
http://jvn.jp/en/jp/JVN83881261/index.html
http://jvndb.jvn.jp/jvndb/JVNDB-2015-000088
http://openwall.com/lists/oss-security/2015/06/19/3
http://www.securityfocus.com/bid/75304
https://github.com/thoughtbot/paperclip/commit/9aee4112f36058cd28d5fe4a006d6981bd1eda57
https://robots.thoughtbot.com/paperclip-security-release
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