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[Security] Bump bleach from 3.2.1 to 3.3.0 #184

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Bumps bleach from 3.2.1 to 3.3.0. This update includes a security fix.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Cross-site scripting in Bleach

Impact

A mutation XSS affects users calling bleach.clean with all of:

  • svg or math in the allowed tags
  • p or br in allowed tags
  • style in allowed tags
  • the keyword argument strip_comments=False

Note: none of the above tags are in the default allowed tags and strip_comments defaults to True.

Patches

Users are encouraged to upgrade to bleach v3.3.0 or greater.

Note: bleach v3.3.0 introduces a breaking change to escape HTML comments by default.

Workarounds

  • modify bleach.clean calls to at least one of:

... (truncated)

Affected versions: < 3.3.0

Changelog

Sourced from bleach's changelog.

Version 3.3.0 (February 1st, 2021)

Backwards incompatible changes

  • clean escapes HTML comments even when strip_comments=False

Security fixes

Features

None

Bug fixes

None

Version 3.2.3 (January 26th, 2021)

Security fixes

None

Features

None

Bug fixes

  • fix clean and linkify raising ValueErrors for certain inputs. Thank you @Google-Autofuzz.

Version 3.2.2 (January 20th, 2021)

Security fixes

None

Features

  • Migrate CI to Github Actions. Thank you @hugovk.

Bug fixes

  • fix linkify raising an IndexError on certain inputs. Thank you @Google-Autofuzz.
Commits

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Bumps [bleach](https://github.com/mozilla/bleach) from 3.2.1 to 3.3.0. **This update includes a security fix.**
- [Release notes](https://github.com/mozilla/bleach/releases)
- [Changelog](https://github.com/mozilla/bleach/blob/master/CHANGES)
- [Commits](mozilla/bleach@v3.2.1...v3.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
@dependabot-preview dependabot-preview bot added dependencies security Pull requests that address a security vulnerability labels Feb 2, 2021
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