OPENSUSE-SU-2021:0552-1: python-bleach&distro=openSUSE Leap 15.2 openSUSE

Published

Published 14-04-2021Last modified 04-02-2026

Vulnerability summary

OPENSUSE-SU-2021:0552-1 is a vulnerability in python-bleach&distro=openSUSE Leap 15.2 openSUSE with no CVSS score yet.

Priority

Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

Not scored

010

No CVSS score recorded

EPSS scoreNot scoredRisk metrics not yet published.

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 3 · Downstream 0 · Related 3

CVE-2020-6816 CVE-2020-6817 CVE-2021-23980

Timeline

14-04-2021
PublishedVulnerability first disclosed.
04-02-2026
Last modifiedVulnerability information updated.

Description

Security update for python-bleach This update for python-bleach fixes the following issues: - CVE-2021-23980: Fixed mutation XSS on bleach.clean with specific combinations of allowed tags (boo#1184547) Update to 3.1.5: * replace missing ``setuptools`` dependency with ``packaging``. Thank you Benjamin Peterson. Update to 3.1.4 (boo#1168280, CVE-2020-6817): * ``bleach.clean`` behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to ``bleach.clean`` with an allowed tag with an allowed ``style`` attribute were vulnerable to ReDoS. For example, ``bleach.clean(..., attributes={'a': ['style']})``. * Style attributes with dashes, or single or double quoted values are cleaned instead of passed through. update to 3.1.3 (boo#1167379, CVE-2020-6816): * Add relative link to code of conduct. (#442) * Drop deprecated 'setup.py test' support. (#507) * Fix typo: curren -> current in tests/test_clean.py (#504) * Test on PyPy 7 * Drop test support for end of life Python 3.4 * ``bleach.clean`` behavior parsing embedded MathML and SVG content with RCDATA tags did not match browser behavior and could result in a mutation XSS. Calls to ``bleach.clean`` with ``strip=False`` and ``math`` or ``svg`` tags and one or more of the RCDATA tags ``script``, ``noscript``, ``style``, ``noframes``, ``iframe``, ``noembed``, or ``xmp`` in the allowed tags whitelist were vulnerable to a mutation XSS.