PYSEC-2021-19

Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/lxml/PYSEC-2021-19.yaml
Aliases
Published
2021-03-21T05:15:00Z
Modified
2023-11-08T04:05:32.182293Z
Summary
[none]
Details

An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safeattrsonly and forms arguments, the Cleaner class does not remove the formaction attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.

References

Affected packages

PyPI / lxml

Package

Name
lxml

Affected ranges

Type
GIT
Repo
https://github.com/lxml/lxml
Events
Introduced
0The exact introduced commit is unknown
Fixed
a5f9cb52079dc57477c460dbe6ba0f775e14a999
Type
ECOSYSTEM
Events
Introduced
0The exact introduced commit is unknown
Fixed
4.6.3

Affected versions

0.*

0.9
0.9.1
0.9.2

1.*

1.0.beta
1.0
1.0.1
1.0.2
1.0.3
1.0.4
1.1alpha
1.1beta
1.1
1.1.1
1.1.2
1.2
1.2.1
1.3beta
1.3
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6

2.*

2.0alpha1
2.0alpha2
2.0alpha3
2.0alpha4
2.0alpha5
2.0alpha6
2.0beta1
2.0beta2
2.0
2.0.1
2.0.2
2.0.3
2.0.4
2.0.5
2.0.6
2.0.7
2.0.8
2.0.9
2.0.10
2.0.11
2.1alpha1
2.1beta1
2.1beta2
2.1beta3
2.1
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.2alpha1
2.2beta1
2.2beta2
2.2beta3
2.2beta4
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.3alpha1
2.3alpha2
2.3beta1
2.3
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6

3.*

3.0
3.0.1
3.0.2
3.1beta1
3.1.0
3.1.1
3.1.2
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.3.0beta1
3.3.0beta2
3.3.0beta3
3.3.0beta4
3.3.0beta5
3.3.0
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.4.0
3.4.1
3.4.2
3.4.3
3.4.4
3.5.0b1
3.5.0
3.6.0
3.6.1
3.6.2
3.6.3
3.6.4
3.7.0
3.7.1
3.7.2
3.7.3
3.8.0

4.*

4.0.0
4.1.0
4.1.1
4.2.0
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.3.0
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.4.0
4.4.1
4.4.2
4.4.3
4.5.0
4.5.1
4.5.2
4.6.0
4.6.1
4.6.2