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Vulnerability · Published Jun 16, 2026 · Assigned by SEC-VLab

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

High 8.7

In plain English

A high-severity authentication bypass in Secure Login (2FA) for Bitbucket from syracom AG. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.5%top 58.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected products (as reported)

VendorProductVersions
syracom AG Secure Login (2FA) for Jira 3.4.0.0 – before 3.5.0.0
syracom AG Secure Login (2FA) for Confluence 3.4.0.0 – before 3.5.0.0
syracom AG Secure Login (2FA) for Bitbucket 3.4.0.0

Weakness: CWE-288 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References