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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLW05bXEtcDJmOS1jZnF2

Bleach URI Scheme Restriction Bypass

An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly sanitized if the values contained character entities. Using character entities, it was possible to construct a URI value with a scheme that was not allowed that would slide through unsanitized.

Permalink: https://github.com/advisories/GHSA-m9mq-p2f9-cfqv
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLW05bXEtcDJmOS1jZnF2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 5 years ago
Updated: 8 months ago


CVSS Score: 9.8
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-m9mq-p2f9-cfqv, CVE-2018-7753
References: Repository: https://github.com/mozilla/bleach
Blast Radius: 47.8

Affected Packages

pypi:bleach
Dependent packages: 450
Dependent repositories: 75,321
Downloads: 22,467,908 last month
Affected Version Ranges: >= 2.1.0, < 2.1.3
Fixed in: 2.1.3
All affected versions: 2.1.1, 2.1.2
All unaffected versions: 0.1.1, 0.1.2, 0.2.1, 0.2.2, 0.3.1, 0.3.3, 0.3.4, 0.5.0, 0.5.1, 1.0.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5, 1.2.1, 1.2.2, 1.4.1, 1.4.2, 1.4.3, 1.5.0, 2.0.0, 2.1.3, 2.1.4, 3.0.0, 3.0.1, 3.0.2, 3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.3.0, 3.3.1, 4.0.0, 4.1.0, 5.0.0, 5.0.1, 6.0.0, 6.1.0