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Insert tag injection in the Contao login module

Moderate severity GitHub Reviewed Published Dec 17, 2019 in contao/contao • Updated Apr 22, 2024

Package

composer contao/contao (Composer)

Affected versions

>= 4.8.4, < 4.8.6

Patched versions

4.8.6
composer contao/core-bundle (Composer)
>= 4.8.4, < 4.8.6
4.8.6

Description

Impact

It is possible to inject insert tags into the login module which will be replaced when the page is rendered.

Patches

Update to Contao 4.8.6.

Workarounds

None.

References

https://contao.org/en/security-advisories/insert-tag-injection-in-the-login-module

For more information

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

References

@leofeyer leofeyer published to contao/contao Dec 17, 2019
Reviewed Dec 17, 2019
Published to the GitHub Advisory Database Dec 17, 2019
Last updated Apr 22, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(44th percentile)

Weaknesses

Improper Encoding or Escaping of Output

The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. Learn more on MITRE.

CVE ID

CVE-2019-19714

GHSA ID

GHSA-jc43-qrrp-98f5

Source code

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