CVE-2021-44543

Publication date 23 December 2021

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

An XSS vulnerability was found in Privoxy which was fixed in cgi_error_no_template() by encode the template name when Privoxy is configured to servce the user-manual itself.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
privoxy	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.04 LTS focal	Fixed 3.0.28-2ubuntu0.2
	18.04 LTS bionic	Fixed 3.0.26-5ubuntu0.3
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
privoxy	Upstream: https://www.privoxy.org/gitweb/?p=privoxy.git;a=commitdiff;h=0e668e9409c

Severity score breakdown

Parameter	Value
Base score	6.1 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Changed
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-5826-1
Privoxy vulnerabilities
25 January 2023