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CVE-2026-42845

The form plugin for Grav adds the ability to create and use forms. Prior to 9.1.0 , there is an unauthenticated page-content overwrite via file upload (GHSA-w4rc-p66m-x6qq). Public form uploads now strip path components from the POST-supplied filename and hard-block page-content extensions (`md`, `yaml`, `yml`, `json`, `twig`, `ini`) regardless of the configurable dangerous-extensions list. A permissive `accept` policy combined with the default `destination: self@` could otherwise let an attacke
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e55fd0eea6fb0802d52be077aaf088feaddbc0a01d90c5656d9dcf9e8d56c88d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"grav-plugin-form","vendor":"getgrav","versions":[{"status":"affected","version":"< 9.1.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b35886585514ab880c2f66d51937f63f2026867684c5310bfdb1f66fdea07598 · sha256:e840593faaa0fbf0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b35886585514ab880c2f66d51937f63f2026867684c5310bfdb1f66fdea07598 · sha256:e840593faaa0fbf0… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b35886585514ab880c2f66d51937f63f2026867684c5310bfdb1f66fdea07598 · sha256:e840593faaa0fbf0… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/getgrav/grav-plugin-form/commit/48bacc4187e1cff815000e526d5ca2878484867f","tags":["x_refsource_MISC"],"url":"https://github.com/getgrav/grav-plugin-form/commit/48bacc4187e1cff815000e526d5ca2878484867f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b35886585514ab880c2f66d51937f63f2026867684c5310bfdb1f66fdea07598 · sha256:e840593faaa0fbf0… · /containers/cna/references/1
{"name":"https://github.com/getgrav/grav/security/advisories/GHSA-w4rc-p66m-x6qq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-w4rc-p66m-x6qq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b35886585514ab880c2f66d51937f63f2026867684c5310bfdb1f66fdea07598 · sha256:e840593faaa0fbf0… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-w4rc-p66m-x6qq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b35886585514ab880c2f66d51937f63f2026867684c5310bfdb1f66fdea07598 · sha256:e840593faaa0fbf0… · /containers/adp/0/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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