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CVE-2015-2963

14
FAUCET Score

CVE-2015-2963 describes a cross-site scripting (XSS) vulnerability in the thoughtbot paperclip gem for Ruby, affecting versions prior to 4.2.2. The flaw stems from improper media-type validation, allowing attackers to upload malicious HTML documents by spoofing the content-type, such as image/jpeg. This vulnerability has a CVSS score of 4.3, indicating a medium attack complexity and potential for partial integrity impact, with no confidentiality or availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.1CPE matchmatch criteria
cpe:2.3:a:thoughtbot:paperclip:*:*:*:*:*:ruby:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
79.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 67th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rubygemspatch availablevia ghsa
Product: paperclipFixed in: 4.2.2
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

rubygemsGHSA-6jvm-3j5h-79f6medium

paperclip Cross-site Scripting vulnerability

Oct 24, 2017

References

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