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  5. CVE-2021-29272

CVE-2021-29272: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

May 18, 2021

bluemonday before 1.0.5 allows XSS because certain Go lowercasing converts an uppercase Cyrillic character, defeating a protection mechanism against the “script” string.

References

  • github.com/advisories/GHSA-3x58-xr87-2fcj
  • github.com/microcosm-cc/bluemonday/commit/524f142fe46e945b7dcd291d7805c4b7dcf75bee
  • github.com/microcosm-cc/bluemonday/issues/111
  • github.com/microcosm-cc/bluemonday/releases/tag/v1.0.5
  • nvd.nist.gov/vuln/detail/CVE-2021-29272

Code Behaviors & Features

Detect and mitigate CVE-2021-29272 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions before 1.0.5

Fixed versions

  • 1.0.5

Solution

Upgrade to version 1.0.5 or above.

Impact 6.1 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source file

go/github.com/microcosm-cc/bluemonday/CVE-2021-29272.yml

Spotted a mistake? Edit the file on GitLab.

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