How severe is CVE-2015-2963?

CVE-2015-2963 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-2963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2963?

CVE-2015-2963 affects Thoughtbot Paperclip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-2963?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-2963 published?

CVE-2015-2963 was published on 2015-07-10 and last updated on 2026-06-17.

CVE-2015-2963

CVE-2015-2963 is a medium-severity vulnerability in Thoughtbot Paperclip with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Thoughtbot Paperclip
Published: 2015-07-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2015-2963?: 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.
How severe is CVE-2015-2963?: CVE-2015-2963 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-2963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2963?: CVE-2015-2963 affects Thoughtbot Paperclip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-2963?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-2963 published?: CVE-2015-2963 was published on 2015-07-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:thoughtbot:paperclip:*:*:*:*:*:ruby:*:*

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