Cross-site Scripting (XSS) Affecting python38-cryptography package, versions <0:2.8-3.module+el8.4.0+8888+89bc7e79


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.16% (54th percentile)

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  • Snyk IDSNYK-CENTOS8-PYTHON38CRYPTOGRAPHY-2130704
  • published26 Jul 2021
  • disclosed21 Mar 2021

Introduced: 21 Mar 2021

CVE-2021-28957  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Centos:8 python38-cryptography to version 0:2.8-3.module+el8.4.0+8888+89bc7e79 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python38-cryptography package and not the python38-cryptography package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling the safe_attrs_only 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.

CVSS Base Scores

version 3.1