CVE-2023-36816: Cross-Site Scripting (XSS) at Account creation in 2FAuth

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-07-03 · updated 2026-06-17
Weakness: CWE-79

Description

2FA is a Web app to manage Two-Factor Authentication (2FA) accounts and generate their security codes. Cross site scripting (XSS) injection can be done via the account/service field. This was tested in docker-compose environment. This vulnerability has been patched in version 4.0.3.

Affected products

Bubka 2FAuth: before 4.0.3 — fixed in 4.0.3

How to fix

Upgrade to a fixed version: Bubka 2FAuth 4.0.3. Check the vendor advisory for mitigations.

References

https://github.com/Bubka/2FAuth/releases/tag/v4.0.3
https://github.com/Bubka/2FAuth/security/advisories/GHSA-cwhq-2mcq-pp9q
https://github.com/Bubka/2FAuth/releases/tag/v4.0.3
https://github.com/Bubka/2FAuth/security/advisories/GHSA-cwhq-2mcq-pp9q

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