CVE-2026-12225: syracom Secure Login (2FA) for Confluence allows 2FA bypass via spoofed User-Agent

Severity: high (CVSS 8.7 v4.0)
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: none known
Published: 2026-06-16 · updated 2026-06-21
Weakness: CWE-288

Description

syracom AG Secure Login (2FA) for Atlassian Jira, Confluence, and Bitbucket 3.4.0.x contains an authentication bypass vulnerability. An attacker with valid credentials for a user account can bypass the two-factor authentication flow by sending HTTP requests with a crafted User-Agent header containing specific strings such as AtlassianMobileApp or JIRA. When such a User-Agent is present, the plugin does not enforce the configured 2FA checks for protected web resources. Successful exploitation allows the attacker to access the affected Atlassian application as the compromised user without completing 2FA. If the compromised account has administrative privileges, the attacker can access administrative functionality and may disable the 2FA plugin or make arbitrary administrative changes. The issue is fixed in version 3.5.0.0.

Affected products

syracom AG Secure Login (2FA) for Bitbucket: 3.4.0.0
syracom AG Secure Login (2FA) for Confluence: from 3.4.0.0 before 3.5.0.0 — fixed in 3.5.0.0
syracom AG Secure Login (2FA) for Jira: from 3.4.0.0 before 3.5.0.0 — fixed in 3.5.0.0

How to fix

Upgrade to a fixed version: syracom AG Secure Login (2FA) for Confluence 3.5.0.0; syracom AG Secure Login (2FA) for Jira 3.5.0.0. Check the vendor advisory for mitigations.

References

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