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CVE-2026-12225 syracom AG CVE debrief

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.

Vendor
syracom AG
Product
Secure Login (2FA) for Jira
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-16
Original CVE updated
2026-06-21
Advisory published
2026-06-16
Advisory updated
2026-06-21

Who should care

Users of syracom AG Secure Login (2FA) for Atlassian Jira, Confluence, and Bitbucket 3.4.0.x

Technical summary

The vulnerability exists in syracom AG Secure Login (2FA) for Atlassian Jira, Confluence, and Bitbucket 3.4.0.x. An attacker can bypass two-factor authentication by sending a crafted User-Agent header.

Defensive priority

HIGH

Recommended defensive actions

  • Update to version 3.5.0.0 or later
  • Restrict access to protected web resources
  • Monitor for suspicious activity

Evidence notes

CVE-2026-12225 has a CVSS score of 8.7 and is considered HIGH severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12225 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12225

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12225 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12225

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://marketplace.atlassian.com/apps/1214491/secure-login-2fa-for-confluence

    551230f0-3615-47bd-b7cc-93e92e730bbf

  • Source reference

    Unverified legacy reference

    URL: https://r.sec-consult.com/syracom

    551230f0-3615-47bd-b7cc-93e92e730bbf

  • Source reference

    Unverified legacy reference

    URL: https://syracom-bee.atlassian.net/wiki/spaces/SL/pages/4193255427/2026-05-11+-+Secure+Login+security+advisory+-+Broken+Access+Control

    551230f0-3615-47bd-b7cc-93e92e730bbf

  • Source reference

    Unverified legacy reference

    URL: https://syracom-bee.atlassian.net/wiki/spaces/SL/pages/4230217729/Mobile+app+login+does+not+work+with+Secure+Login

    551230f0-3615-47bd-b7cc-93e92e730bbf

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.