CVE-2020-25768
Contao Insert tag injection in forms
Contao before 4.4.52, 4.9.x before 4.9.6, and 4.10.x before 4.10.1 have Improper Input Validation. It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Contao before 4.4.52, 4.9.x before 4.9.6, and 4.10.x before 4.10.1 have Improper Input Validation. It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
- Record
CVE-2020-25768- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-20, CWE-74
- Updated
- 2026-11-02
CVE List No score
Contao before 4.4.52, 4.9.x before 4.9.6, and 4.10.x before 4.10.1 have Improper Input Validation. It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
- Record
CVE-2020-25768- Updated
- 2026-11-02
EUVDEUVD-2020-1014 No score
Contao before 4.4.52, 4.9.x before 4.9.6, and 4.10.x before 4.10.1 have Improper Input Validation. It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
- Record
EUVD-2020-1014- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f7wm-x4gw-6m23
Contao Insert tag injection in forms
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.
- Record
GHSA-f7wm-x4gw-6m23- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20, CWE-74
- Updated
- 2026-11-02
OSV
Contao before 4.4.52, 4.9.x before 4.9.6, and 4.10.x before 4.10.1 have Improper Input Validation. It is possible to inject insert tags in front end forms which will be replaced when the page is rendered.
- Record
CVE-2020-25768- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-f7wm-x4gw-6m23
Contao Insert tag injection in forms
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.
- Record
GHSA-f7wm-x4gw-6m23- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-20, CWE-74
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
contao/core-bundlePackagist |
4.0.0 up to 4.4.52 | 4.4.52 |
contao/core-bundlePackagist |
4.5.0 up to 4.9.6 | 4.9.6 |
contao/contaoPackagist |
4.0.0 up to 4.4.52 | 4.4.52 |
contao/contaoPackagist |
4.5.0 up to 4.9.6 | 4.9.6 |
contao/contaoPackagist |
4.10.0 up to 4.10.1 | 4.10.1 |
contao/core-bundlePackagist |
4.10.0 up to 4.10.1 | 4.10.1 |
contao/core-bundlePackagist |
4.0.0 up to 4.4.52, plus listed versions 4.0.14.0.24.0.34.0.44.1.0 Show 45 moreShow less4.1.0-RC14.1.0-beta14.1.14.1.24.1.34.2.04.2.0-RC14.2.0-beta14.2.14.2.24.2.34.2.44.2.54.3.04.3.0-RC14.3.14.3.104.3.114.3.24.3.34.3.44.3.54.3.64.3.74.3.84.3.94.4.04.4.0-RC14.4.0-RC24.4.0-beta14.4.14.4.104.4.114.4.124.4.134.4.144.4.154.4.164.4.174.4.184.4.194.4.24.4.204.4.214.4.22 |
4.4.52 |
contao/core-bundlePackagist |
4.5.0 up to 4.9.6, plus listed versions 4.5.14.5.104.5.114.5.124.5.13 Show 45 moreShow less4.5.144.5.24.5.34.5.44.5.54.5.64.5.74.5.84.5.94.6.04.6.0-RC14.6.0-RC24.6.0-RC34.6.14.6.104.6.114.6.124.6.134.6.144.6.24.6.34.6.44.6.54.6.64.6.74.6.84.6.94.7.04.7.0-RC14.7.0-RC24.7.0-RC34.7.0-RC44.7.14.7.24.7.34.7.44.7.54.7.64.7.74.8.04.8.0-RC14.8.0-RC24.8.14.8.24.8.3 |
4.9.6 |
contao/contaoPackagist |
4.0.0 up to 4.4.52, plus listed versions 4.4.224.4.234.4.244.4.254.4.26 Show 25 moreShow less4.4.274.4.284.4.294.4.304.4.314.4.324.4.334.4.344.4.354.4.364.4.374.4.384.4.394.4.404.4.414.4.424.4.434.4.444.4.454.4.464.4.474.4.484.4.494.4.504.4.51 |
4.4.52 |
contao/contaoPackagist |
4.5.0 up to 4.9.6, plus listed versions 4.5.134.5.144.6.04.6.14.6.10 Show 43 moreShow less4.6.114.6.124.6.134.6.144.6.24.6.34.6.44.6.54.6.64.6.74.6.84.6.94.7.04.7.0-RC14.7.0-RC24.7.0-RC34.7.0-RC44.7.14.7.24.7.34.7.44.7.54.7.64.7.74.8.04.8.0-RC14.8.0-RC24.8.14.8.24.8.34.8.44.8.54.8.64.8.74.8.84.9.04.9.0-RC14.9.0-RC24.9.14.9.24.9.34.9.44.9.5 |
4.9.6 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-25768 is a medium vulnerability (CVSS 5.3) in Contao, published September 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.82%, the 57th percentile. Fixed in contao/core-bundle 4.4.52.
References
community.contao.org/en/forumdisplay.php?4-Announcements
contao.org/en/security-advisories/insert-tag-injection-in-forms.html
github.com/contao/contao/security/advisories/GHSA-f7wm-x4gw-6m23
nvd.nist.gov/vuln/detail/CVE-2020-25768
Left out here: 49 versions. The JSON record has them.