CVE-2026-12225 syracom Secure Login (2FA) for Confluence allows 2FA bypass via spoofed User-Agent
Attackers with valid credentials can bypass two-factor authentication by spoofing specific User-Agent headers, potentially gaining administrative access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12225?
CVE-2026-12225 is a high-severity authentication bypass vulnerability in syracom AG Secure Login (2FA) for Bitbucket, published on 16 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-288
Which versions are affected by CVE-2026-12225?
How do I fix CVE-2026-12225?
No fix has been published for CVE-2026-12225 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-12225 being exploited?
There is no known exploitation of CVE-2026-12225 in the wild and no public exploit code.
Sources
Also known as GHSA-xfw8-8p99-43jw.