CVE-2015-2963 paperclip Cross-site Scripting vulnerability
Remote attackers can upload HTML files with spoofed content types to execute cross-site scripting attacks in applications using the Paperclip gem.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2015-2963?
CVE-2015-2963 is a medium-severity cross-site scripting vulnerability in n/a, published on 10 Jul 2015. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2015-2963?
2 open source packages ship an affected version, including paperclip. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
paperclip RubyGems | All versions | 4.2.2 |
paperclip RubyGems | All versions | 4.2.2 |
Products include Thoughtbot Paperclip.
How do I fix CVE-2015-2963?
Upgrade paperclip to 4.2.2 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2015-2963 being exploited?
There is no known exploitation of CVE-2015-2963 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-6jvm-3j5h-79f6.