Server-side template injection
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1336.
Summary
SEPPmail Secure Email Gateway before version 15.0.4 contains a server-side template injection vulnerability in the new GINA UI because an endpoint accepts attacker-controlled template, allowing remote attackers to execute arbitrary template expressions and potentially achieve remote code execution depending on the enabled template plugins.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Secure Email Gateway (SEPPmail AG) Fixed in 15.0.4
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
SEPPmail Secure Email Gateway 15.0.4
5 records Highest priority Priority MEDIUM 4 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-32138 Local File Inclusion (LFI) and Arbitrary File DeletionPriority MEDIUM 60
- TI-2026-06922 Exposure of Sensitive Information to an Unauthorized ActorPriority MEDIUM 53
- TI-2026-32136 Missing Authorization in GINAv2Priority MEDIUM 48
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44129
- 2026-10-03 Alias added: GHSA-wc7f-vvj8-28m9
- 2026-10-25 EPSS moved to the below the 50th percentile
References
More SEPPmail vulnerabilities
- TI-2026-02349 SEPPmail User Web Interface Arbitrary File Write to RCE CVSS 4.0CRITICAL 10.0
- TI-2026-32138 Local File Inclusion (LFI) and Arbitrary File Deletion CVSS 4.0HIGH 8.8
- TI-2021-11768 SEPPMail's web frontend, user input is not embedded correctly in the web page and… CVSS 3.1MEDIUM 6.1
- TI-2021-11767 The SEPPmail solution is vulnerable to a Cross-Site Scripting vulnerability (XSS)… CVSS 3.1MEDIUM 6.1
- TI-2026-06922 Exposure of Sensitive Information to an Unauthorized Actor CVSS 4.0MEDIUM 6.9
- TI-2026-32139 Unauthenticated remote code execution in SEPPmail Secure Email Gateway CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-44129 · CVE Program
- CVE-2026-44129 · NVD
- FIRST EPSS
- GHSA-wc7f-vvj8-28m9 · GitHub Advisory Database · CC BY 4.0
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