CVE-2020-27783

critical

Description

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.

References

https://www.oracle.com//security-alerts/cpujul2021.html

https://www.debian.org/security/2020/dsa-4810

https://security.netapp.com/advisory/ntap-20210521-0003/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMHVKRUT22LVWNL3TB7HPSDHJT74Q3JK/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKG67GPGTV23KADT4D4GK4RMHSO4CIQL/

https://lists.debian.org/debian-lts-announce/2020/12/msg00028.html

https://bugzilla.redhat.com/show_bug.cgi?id=1901633

https://advisory.checkmarx.net/advisory/CX-2020-4286

Details

Source: Mitre, NVD

Published: 2020-12-03

Updated: 2023-11-07

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

CVSS v4

Base Score: 9.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: Critical