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  5. CVE-2021-21332

CVE-2021-21332: Cross-site scripting (XSS) vulnerability in the password reset endpoint

March 26, 2021 (updated September 30, 2024)

The password reset endpoint served via Synapse was vulnerable to cross-site scripting (XSS) attacks. The impact depends on the configuration of the domain that Synapse is deployed on, but may allow access to cookies and other browser data, CSRF vulnerabilities, and access to other resources served on the same domain or parent domains.

References

  • github.com/advisories/GHSA-246w-56m2-5899
  • github.com/matrix-org/synapse
  • github.com/matrix-org/synapse/commit/e54746bdf7d5c831eabe4dcea76a7626f1de73df
  • github.com/matrix-org/synapse/pull/9200
  • github.com/matrix-org/synapse/releases/tag/v1.27.0
  • github.com/matrix-org/synapse/security/advisories/GHSA-246w-56m2-5899
  • github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2021-133.yaml
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TNNAJOZNMVMXM6AS7RFFKB4QLUJ4IFEY
  • nvd.nist.gov/vuln/detail/CVE-2021-21332

Code Behaviors & Features

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Affected versions

All versions before 1.27.0

Fixed versions

  • 1.27.0

Solution

Upgrade to version 1.27.0 or above.

Impact 8.2 HIGH

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

Learn more about CVSS

Weakness

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

Source file

pypi/matrix-synapse/CVE-2021-21332.yml

Spotted a mistake? Edit the file on GitLab.

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