CVE-2026-12225

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

HIGH
8.7
CVSS Score
Published: June 16, 2026 at 11:20 AM UTC
Updated: June 21, 2026 at 09:56 AM UTC
1 product affected across 1 vendorSecure Login

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Severity
HIGH8.7
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.4.0.0 ≤ v < 3.5.0.03.4.0.0
Affected range stops below 3.5.0.0, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHSEC-VLab
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-288

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