Is CVE-2022-45442 in the CISA KEV catalog?

No. CVE-2022-45442 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-45442?

CVE-2022-45442 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2022-45442?

CVE-2022-45442 has an EPSS score of 0.64% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-45442?

Upgrade ruby-sinatra on debian 11 to 2.0.8.1-2+deb11u1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2022-45442

HIGH

8.8

CVSS v3

NVD

Description

Sinatra is a domain-specific language for creating web applications in Ruby. An issue was discovered in Sinatra 2.0 before 2.2.3 and 3.0 before 3.0.4. An application is vulnerable to a reflected file download (RFD) attack that sets the Content-Disposition header of a response when the filename is derived from user-supplied input. Version 2.2.3 and 3.0.4 contain patches for this issue.

CWE-494

How to fix

Remediation Available

ruby-sinatraDebian

Fixed in:2.0.8.1-2+deb11u1CVE-2022-45442

Fixed in:3.0.5-2CVE-2022-45442

ruby-sinatraUbuntu

Fixed in:1.4.7-3ubuntu0.1~esm2USN-7664-1

Fixed in:1.4.8-1ubuntu0.1~esm2USN-7664-1

Fixed in:2.0.8.1-1ubuntu0.1~esm2USN-7664-1

Fixed in:2.0.8.1-2+deb11u1build0.22.04.1USN-7664-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.64%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Patch1

github.com

Exploit1

blackhat.com

Third-Party Advisory2

Other references2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.