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TI-2026-82310 Aliases CVE-2026-115301GHSA-vw93-qjx2-fxhw

Server-side template injection in Contact Form by Supsystic plugin

Priority LOW 34CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-94.

Summary

The Contact Form by Supsystic WordPress plugin before 1.11.1 does not sandbox the template engine that renders its forms, so stored form-editor content reaches the engine as executable template code (CWE-94). An administrator can use this server-side template injection to execute arbitrary code on the server. The injected template runs whenever a visitor loads a page with the form, so an unauthenticated visitor can read server-side secrets such as authentication salts and database credentials. An exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

The Contact Form by Supsystic WordPress plugin before 1.11.1 does not sandbox the template engine used to render its forms and allows stored form-editor content to reach that engine as executable template code, enabling an administrator to perform server-side template injection and execute arbitrary code on the server. The injected template is compiled and executed whenever any visitor loads a page containing the form, so the stored payload also lets an unauthenticated visitor read server-side secrets such as authentication salts and database credentials.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00422 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed Contact Form by Supsystic (Unknown): 1.11.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
UnknownContact Form by Supsysticbefore 1.11.11.11.1Patch availableCNA
  • Contact Form by Supsystic VendorUnknown Affected before 1.11.1 Fixed in 1.11.1 Patch available CNA

Remediation

Update Contact Form by Supsystic to version 1.11.1 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Contact Form by Supsystic (Unknown) Fixed in 1.11.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Contact Form by Supsystic 1.11.1

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-82311 Contact Form by Supsystic lets attackers delete statisticsPriority LOW 29
    • TI-2026-82308 CSRF in Contact Form by Supsystic lets attackers change mail settingsPriority LOW 23
    • TI-2026-82309 Missing CSRF checks in Contact Form by Supsystic let attackers delete dataPriority LOW 19
    Show all 5 records →

Timeline

  1. 2026-10-29 Threatist record created from CVE-2026-115301
  2. 2026-10-29 Alias added: GHSA-vw93-qjx2-fxhw
  3. 2026-10-29 CVSS score added · CISA ADP
  4. 2026-10-29 Weakness changed · CISA ADP
  5. 2026-10-29 CISA SSVC decision points changed

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences