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CVE-2022-39348· NVD / CVE Program· CNA GitHub_M

Twisted vulnerable to NameVirtualHost Host header injection

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.3% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: twisted twisted 22.10.0rc1.

Low priority for now. Upgrade to twisted twisted 22.10.0rc1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.4 · v3.1—No exploit Fix available
Published
Oct 26, 2022
Updated
Jun 17, 2026
EPSS
1.2% · 69th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.4
CNA · GitHub_M
5.4
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-39348

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
twistedtwisted
debiandebian linux

Limit the impact of XSS

This is a cross-site scripting (XSS) vulnerability. A well-configured Content-Security-Policy doesn't fix it, but greatly reduces its impact. Check your site's CSP and other security headers for free.

Check security headers

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • twisted twisted0.9.4 and later · before 22.10.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • twisted twisted

    • >= 0.9.4, < 22.10.0rc1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:10twistedbefore 18.9.0-3+deb10u218.9.0-3+deb10u2
Debian:11twistedbefore 20.3.0-7+deb11u220.3.0-7+deb11u2
Debian:12twistedbefore 22.4.0-422.4.0-4
openSUSE:Tumbleweedpython-Twistedbefore 22.10.0-1.122.10.0-1.1
PyPItwistedfrom 0.9.4 · before 22.10.0rc122.10.0rc1
SUSE:HPE Helion OpenStack 8python-Twistedbefore 15.2.1-9.23.115.2.1-9.23.1
SUSE:Linux Enterprise Module for Package Hub 15 SP3python-Twistedbefore 19.10.0-150200.3.18.119.10.0-150200.3.18.1
SUSE:Linux Enterprise Module for Package Hub 15 SP3python-Twistedbefore 19.10.0-150200.3.18.119.10.0-150200.3.18.1
SUSE:Linux Enterprise Module for Server Applications 15 SP4python-Twistedbefore 22.2.0-150400.5.7.122.2.0-150400.5.7.1
SUSE:Linux Enterprise Module for Server Applications 15 SP4python-Twistedbefore 22.2.0-150400.5.7.122.2.0-150400.5.7.1

Same product

twisted: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-10109In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability.
    40Plan
  • CVE-2020-10108In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability.
    40Plan
  • CVE-2024-41671twisted.web has disordered HTTP pipeline response
    33Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2022-21716Mar 3, 2022 · Buffer Overflow in Twisted
    31Monitor
  • ← EarlierCVE-2022-24801Apr 4, 2022 · HTTP Request Smuggling in twisted.web
    33Monitor
  • Later →CVE-2023-46137Oct 25, 2023 · twisted.web has disordered HTTP pipeline response
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
twisted twisted22.10.0rc1 · descriptionVendor (CNA)
debian:twisted22.4.0-4 · Debian:12Package registry (OSV)
opensuse:python-Twisted22.2.0-150400.5.7.1 · openSUSE:Leap 15.4Package registry (OSV)
PyPI:twisted22.10.0rc1Package registry (OSV)
suse:python-Twisted22.2.0-150400.5.7.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP4Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
Low
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

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

nvd-primary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records