A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings.
Metrics
Affected Vendors & Products
References
History
Fri, 29 May 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | SSTI in Mautic Theme Engine Allows Authenticated Remote Code Execution | |
| First Time appeared |
Mautic
Mautic mautic |
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| Vendors & Products |
Mautic
Mautic mautic |
Fri, 29 May 2026 11:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Fri, 29 May 2026 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings. | |
| Weaknesses | CWE-1336 | |
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mautic
Published:
Updated: 2026-05-29T10:49:06.099Z
Reserved: 2026-05-26T08:36:52.218Z
Link: CVE-2026-9558
Updated: 2026-05-29T10:49:00.571Z
Status : Deferred
Published: 2026-05-29T11:16:17.980
Modified: 2026-05-29T15:39:34.620
Link: CVE-2026-9558
No data.
OpenCVE Enrichment
Updated: 2026-05-29T11:30:42Z