CVE Explorer

CVE-2026-4257

The Contact Form by Supsystic plugin for WordPress is vulnerable to Server-Side Template Injection (SSTI) leading to Remote Code Execution (RCE) in all versions up to, and including, 1.7.36. This is due to the plugin using the Twig `Twig_Loader_String` template engine without sandboxing, combined with the `cfsPreFill` prefill functionality that allows unauthenticated users to inject arbitrary Twig expressions into form field values via GET parameters. This makes it possible for unauthenticated a

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fa97d089f884b8e5ba0e9e365f5c77d247c504dd34e1f958c3df749dc0acde06

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"Contact Form by Supsystic","vendor":"supsysticcom","versions":[{"lessThanOrEqual":"1.7.36","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:9ef6e3f3a31f975ed8c0028671126e005deda309554d8f8c057955936354d86a · sha256:167485ee53818487… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"baseScore":9.8,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:9ef6e3f3a31f975ed8c0028671126e005deda309554d8f8c057955936354d86a · sha256:167485ee53818487… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-94","description":"CWE-94 Improper Control of Generation of Code ('Code Injection')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:9ef6e3f3a31f975ed8c0028671126e005deda309554d8f8c057955936354d86a · sha256:167485ee53818487… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"url":"https://plugins.trac.wordpress.org/browser/contact-form-by-supsystic/tags/1.7.36/modules/forms/views/forms.php#L323"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ef6e3f3a31f975ed8c0028671126e005deda309554d8f8c057955936354d86a · sha256:167485ee53818487… · /containers/cna/references/1

{"url":"https://plugins.trac.wordpress.org/changeset/3491826/contact-form-by-supsystic"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ef6e3f3a31f975ed8c0028671126e005deda309554d8f8c057955936354d86a · sha256:167485ee53818487… · /containers/cna/references/2

{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/415c9658-bfb2-453b-a697-c63c08b0ca61?source=cve"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:9ef6e3f3a31f975ed8c0028671126e005deda309554d8f8c057955936354d86a · sha256:167485ee53818487… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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