CVE-2020-27783

2020-12-0300:00:00

ubuntu.com

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.004 Low

EPSS

Percentile

72.6%

JSON

A XSS vulnerability was discovered in python-lxml’s clean module. The
module’s parser didn’t properly imitate browsers, which caused different
behaviors between the sanitizer and the user’s page. A remote attacker
could exploit this flaw to run arbitrary HTML/JS code.

Notes

Author	Note
sbeattie	according to lxml upstream, first commit does not fix completely, second commit is needed/fixes issue better.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlxml< 4.2.1-1ubuntu0.3UNKNOWN
ubuntu20.04noarchlxml< 4.5.0-1ubuntu0.2UNKNOWN
ubuntu20.10noarchlxml< 4.5.2-1ubuntu0.3UNKNOWN
ubuntu14.04noarchlxml< 3.3.3-1ubuntu0.2+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlxml< 3.5.0-1ubuntu0.3UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	lxml	< 4.2.1-1ubuntu0.3	UNKNOWN
ubuntu	20.04	noarch	lxml	< 4.5.0-1ubuntu0.2	UNKNOWN
ubuntu	20.10	noarch	lxml	< 4.5.2-1ubuntu0.3	UNKNOWN
ubuntu	14.04	noarch	lxml	< 3.3.3-1ubuntu0.2+esm2) Available with Ubuntu Pro or Ubuntu Pro (Infra-only	UNKNOWN
ubuntu	16.04	noarch	lxml	< 3.5.0-1ubuntu0.3	UNKNOWN