CVE-2023-36806

mediumpriority · track · 22EPSS 0.006 · 50 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.64% (50th) EPSS

CVSS 5.4 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.4mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 2.3 · impact 2.7

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Lsecondary · ENISA EU

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 2.3 · impact 3.7

v3.16.6mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · OSV

v3.15mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

affected products (9)

Products and version ranges known to be affected.

contao contao4.0.0, → 4.9.42enisa_euvdEU
contao contao4.10.0, → 4.13.28enisa_euvdEU
contao contao5.0.0, → 5.1.10enisa_euvdEU
contao contao4.0.0 → 4.9.42nvdUScpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*
contao contao4.10.0 → 4.13.28nvdUScpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*
contao contao5.0.0 → 5.1.10nvdUScpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*
Packagist contao/core-bundle4.0.0 → 4.9.42osvUSpkg:composer/contao/core-bundle
Packagist contao/core-bundle4.10.0 → 4.13.28osvUSpkg:composer/contao/core-bundle
Packagist contao/core-bundle5.0.0 → 5.1.10osvUSpkg:composer/contao/core-bundle

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-4gpr-p634-922xCross site scripting via input unit widget2023-07-25ghsa · osvUS
### Impact Authenticated users can inject malicious code in widgets with units, which is then executed both in the element preview (back end) and on the website (front end). ### Patches Update to Contao 4.9.42, 4.13.28 or 5.1.10. ### Workarounds Disable login for all untrusted back end users. ### References https://contao.org/en/security-advisories/cross-site-scripting-in-widgets-with-units ### For more information If you have any questions or comments about this advisory, open an issue in [contao/contao](https://github.com/contao/contao/issues/new/choose). ### Credits Thanks to Christian Pöschl and Fabian Brenner from usd AG for reporting this vulnerability.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2023-07-25modified 2026-06-17

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+53007 more

references (16)

External citations — patches, advisories, analysis.

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