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Medium

Contao Insert tag injection in forms

  • Disclosed: 24.09.2020
  • Updated: 11.10.2026 10:22

Impact

It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.

Patches

Update to Contao 4.4.52, 4.9.6 or 4.10.1.

Workarounds

Disable the front end login form and do not use form fields with array keys such as fieldname[].

References

https://contao.org/en/security-advisories/insert-tag-injection-in-forms

For more information

If you have any questions or comments about this advisory, open an issue in contao/contao.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package contao/contao >= 4.0.0, < 4.4.52, >= 4.5.0, < 4.9.6, >= 4.10.0, < 4.10.1 4.4.52, 4.9.6, 4.10.1
Composer package contao/core-bundle >= 4.0.0, < 4.4.52, >= 4.5.0, < 4.9.6, >= 4.10.0, < 4.10.1 4.4.52, 4.9.6, 4.10.1

References

CVSS score 5.3/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE)
CWE-20, CWE-74
Platform
Composer
Package
contao/contao, contao/core-bundle
Disclosed
24.09.2020
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-f7wm-x4gw-6m23 - CC BY 4.0

Vulnerability history: contao/contao

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (25) in the archive
Total entries
25
First → latest
12.2019 09.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 4
  • High 6
  • Medium 12
  • Low 3

Disclosures per year

Severity:
  1. Path traversal vulnerability in the file manager
    High · 8.8 CVE-2023-29200 >= 4.9.0, < 4.9.40, >= 4.13.0, < 4.13.21, >= 5.1.0, < 5.1.4 4.9.40, 4.13.21, 5.1.4
  2. Contao SQL injection in the file manager
    Critical · 9.8 CVE-2019-11512 >= 4.1.0, < 4.4.39, >= 4.5.0, < 4.7.5 4.4.39, 4.7.5
  3. Contao SQL injection in the backend and listing module
    Critical · 9.8 CVE-2017-16558 >= 3.0.0, <= 3.5.30, >= 4.0.0, < 4.4.8 4.4.8
  4. Cross site scripting via canonical tag in Contao
    High · 7.2 CVE-2022-24899 >= 4.13.0, < 4.13.3 4.13.3
  5. Contao CSRF Token Bypass
    High · 8.8 CVE-2019-10642 >= 4.7.0, < 4.7.3 4.7.3
  6. Contao Does Not Invalidate Existing Sessions When Password Changes
    Critical · 9.8 CVE-2019-10641 >= 4.0.0, < 4.4.37, >= 4.5.0, < 4.7.3 4.4.37, 4.7.3
  7. Contao Core directory traversal vulnerability
    High · 8.8 CVE-2017-10993 >= 4.0.0, < 4.4.1 4.4.1
  8. Contao Does Not Expire Tokens Correctly
    Critical · 9.8 CVE-2019-10643 >= 4.7.0, < 4.7.3 4.7.3
  9. Privilege escalation via form generator
    High · 8.0 CVE-2021-37627 >= 4.0.0, < 4.4.56, >= 4.5.0, < 4.9.18, >= 4.10.0, < 4.11.7 4.4.56, 4.9.18, 4.11.7
  10. Contao Insert tag injection in forms this entry
    Medium · 5.3 CVE-2020-25768 >= 4.0.0, < 4.4.52, >= 4.5.0, < 4.9.6, >= 4.10.0, < 4.10.1 4.4.52, 4.9.6, 4.10.1
  11. Unrestricted file uploads in Contao
    High · 8.8 CVE-2019-19745 >= 4.0.0, < 4.4.46, >= 4.5.0, < 4.8.6 4.4.46, 4.8.6

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