Is CVE-2022-39348 in the CISA KEV catalog?

No. CVE-2022-39348 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-39348?

CVE-2022-39348 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2022-39348?

CVE-2022-39348 has an EPSS score of 1.16% (64th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-39348?

Upgrade twisted on debian 11 to 20.3.0-7+deb11u2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2022-39348

MEDIUM

5.4

CVSS v3

NVD

Description

Twisted is an event-based framework for internet applications. Started with version 0.9.4, when the host header does not match a configured host `twisted.web.vhost.NameVirtualHost` will return a `NoResource` resource which renders the Host header unescaped into the 404 response allowing HTML and script injection. In practice this should be very difficult to exploit as being able to modify the Host header of a normal HTTP request implies that one is already in a privileged position. This issue was fixed in version 22.10.0rc1. There are no known workarounds.

CWE-79Cross-Site Scripting (XSS)CWE-80

How to fix

Remediation Available

twistedDebian

Fixed in:20.3.0-7+deb11u2CVE-2022-39348

Fixed in:22.4.0-4CVE-2022-39348

python3-twistedUbuntu

Fixed in:18.9.0-11ubuntu0.20.04.3USN-6575-1

Fixed in:22.1.0-2ubuntu2.4USN-6575-1

Fixed in:22.4.0-4ubuntu0.23.04.1USN-6575-1

Fixed in:22.4.0-4ubuntu0.23.10.1USN-6575-1

twistedUbuntu

Fixed in:18.9.0-11ubuntu0.20.04.3USN-6575-1

Fixed in:22.1.0-2ubuntu2.4USN-6575-1

Fixed in:22.4.0-4ubuntu0.23.04.1USN-6575-1

Fixed in:22.4.0-4ubuntu0.23.10.1USN-6575-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 RequiredLow

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

1.16%probability of exploitation in 30 days

64thpercentile

Moderate risk: more likely to be exploited than 64% of all known CVEs.

References

Patch3

Third-Party Advisory2

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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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 2025-11-03.