CVE-2023-36806 json
Contao cross site scripting vulnerability via input unit widget
published 2023-07-25 3 y ago modified 2026-09-10 1 mo ago also GHSA-4gpr-p634-922x , EUVD-2023-1951
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
Contao is an open source content management system. Starting in version 4.0.0 and prior to versions 4.9.42, 4.13.28, and 5.1.10, it is possible for untrusted backend users to inject malicious code into headline fields in the back end, which will be executed both in the element preview (back end) and on the website (front end). Installations are only affected if there are untrusted back end users who have the rights to modify headline fields, or other fields using the input unit widget. Contao 4.9.42, 4.13.28, and 5.1.10 have a patch for this issue. As a workaround, disable the login for all untrusted back end users.
Patch / fix
- packagist contao/core-bundle 4.9.42, 4.13.28, 5.1.10
- contao contao 4.9.42, 4.13.28, 5.1.10
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- herolab.usd.de https://herolab.usd.de/security-advisories/usd-2023-0020/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 6.6 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | contao/core-bundle | >=4.0.0, <4.9.42 >=4.10.0, <4.13.28 >=5.0.0, <5.1.10 |
4.9.42 4.13.28 5.1.10 |
Affected products
- contao contao
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/contao/contao/commit/5c9aff32cfc1f7dc452a045862ac2f86a6b9b4b4
web, patch
-
github.com
/contao/contao/commit/c98585d36baa25fda69c062421e7e7eadc53c82b
web, patch
-
github.com
/contao/contao/commit/ccb64c777eb0f9c0e6490c9135d80e915d37cd32
web, patch
-
herolab.usd.de
/security-advisories/usd-2023-0020/
exploit, third-party-advisory
-
github.com
/contao/contao/security/advisories/GHSA-4gpr-p634-922x
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-36806
advisory
-
github.com
/contao/contao
package
-
herolab.usd.de
/security-advisories/usd-2023-0020
web
Sources
- CVE List CVE-2023-36806
- GitHub Advisory GHSA-4gpr-p634-922x
- NVD CVE-2023-36806
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