CVE-2026-111665: Auth Bypass (CVSS 5.4)

Description

Piranha CMS through 12.2 contains a missing authorization vulnerability in the Piranha.Manager LanguageApiController that allows any authenticated manager user to list, create, edit and delete site languages without the granular Language, LanguageAdd, LanguageEdit or LanguageDelete permissions. Attackers can call the manager/api/language Get, Save and Delete actions directly to remove languages and reassign sites to the default, affecting localized content instance-wide.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

EPSS — Exploit Prediction

0.0034

Probability of exploitation

0.27%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-862 Missing Authorization

References

Other References

https://github.com/PiranhaCMS/piranha.core/blob/v12.2/core/Piranha.Manager/Controllers/LanguageApiController.cs#L21-L89 https://github.com/PiranhaCMS/piranha.core/blob/v12.2/core/Piranha.Manager/Services/LanguageService.cs#L84-L110 https://hackmd.io/@hieuPenguinnn/piranha-cms-manager-language-api-missing-permission https://www.vulncheck.com/advisories/piranha-cms-through-12.2-missing-authorization-in-manager-language-api https://hackmd.io/@hieuPenguinnn/piranha-cms-manager-language-api-missing-permission

Frequently Asked Questions

What is CVE-2026-111665? +

Piranha CMS through 12.2 contains a missing authorization vulnerability in the Piranha.Manager LanguageApiController that allows any authenticated manager user to list, create, edit and delete site languages without the granular Language, LanguageAdd, LanguageEdit or LanguageDelete permissions. Attackers can call the manager/api/language Get, Save and Delete actions directly to remove languages and reassign sites to the default, affecting localized content instance-wide. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-111665? +

CVE-2026-111665 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0034, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-111665? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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