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

Quick assessment

Affected
syracom AG Secure Login (2FA) for Jira
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Syracom Secure Login (2FA) for Jira是德国Syracom公司的一个支持双因素认证的Jira登录安全插件 Syracom Secure Login (2FA) for Jira 3.4.0.0版本、Secure Login (2FA) for Confluence 3.4.0.0版本和Secure Login (2FA) for Bitbucket 3.4.0.0版本存在授权问题漏洞，该漏洞源于存在身份验证绕过漏洞，导致攻击者通过发送包含特制User-Agent标头的HTT

AI Predicted 8.1 Difficulty: Trivial EPSS 0.48% · P40

Affected Version Matrix 3

VendorProduct Version RangeStatus
syracom AG Secure Login (2FA) for Bitbucket 3.4.0.0 affected
syracom AG Secure Login (2FA) for Confluence 3.4.0.0< 3.5.0.0 affected
syracom AG Secure Login (2FA) for Jira 3.4.0.0< 3.5.0.0 affected
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I. Basic Information for CVE-2026-12225

Vulnerability Information
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Vulnerability Title
syracom Secure Login (2FA) for Confluence allows 2FA bypass via spoofed User-Agent
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Syracom Secure Login (2FA) for Jira 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Syracom Secure Login (2FA) for Jira是德国Syracom公司的一个支持双因素认证的Jira登录安全插件 Syracom Secure Login (2FA) for Jira 3.4.0.0版本、Secure Login (2FA) for Confluence 3.4.0.0版本和Secure Login (2FA) for Bitbucket 3.4.0.0版本存在授权问题漏洞，该漏洞源于存在身份验证绕过漏洞，导致攻击者通过发送包含特制User-Agent标头的HTT
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
syracom AG Secure Login (2FA) for Jira 3.4.0.0 ~ 3.5.0.0 -
syracom AG Secure Login (2FA) for Confluence 3.4.0.0 ~ 3.5.0.0 -
syracom AG Secure Login (2FA) for Bitbucket 3.4.0.0 -

II. Public POCs for CVE-2026-12225

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III. Intelligence Information for CVE-2026-12225

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Vendor Advisories for CVE-2026-12225 (1)

Security Blog Posts for CVE-2026-12225 (1)

Vendor Pages for CVE-2026-12225 (1)

Other References for CVE-2026-12225 (1)

IV. Related Vulnerabilities

Same weakness: CWE-288

V. Comments for CVE-2026-12225

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