Cross site scripting via canonical tag

Description

Contao is a powerful open source CMS that allows you to create professional websites and scalable web applications. In versions of Contao prior to 4.13.3 it is possible to inject code into the canonical tag. As a workaround users may disable canonical tags in the root page settings.

Scores

EPSS (exploitation in 30 days)

4.5% · top 8.5% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Weakness

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• contao · contao

  • affected < 4.13.3

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• Packagistcontao/contaoGHSA-m8x6-6r63-qvj2 (opens in a new tab)
• Packagistcontao/core-bundleGHSA-m8x6-6r63-qvj2 (opens in a new tab)

References (3)

• https://github.com/contao/contao/commit/199206849a87ddd0fa5cf674eb3c58292fd8366c (opens in a new tab)x_refsource_MISCx_transferred
• https://github.com/contao/contao/security/advisories/GHSA-m8x6-6r63-qvj2 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://contao.org/en/security-advisories/cross-site-scripting-via-canonical-url.html (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-m8x6-6r63-qvj2 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-24899](https://trackcve.app/badge/CVE-2022-24899.svg)](https://trackcve.app/cve/CVE-2022-24899)

Record last updated 23 Apr 2025, 18:29 UTC.