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CVE-2026-61457

The Grav API plugin (getgrav/grav-plugin-api) before 1.0.3 contains a file upload extension bypass in the API media controller. HandlesMediaUploads::validateFileExtension() inspects only the final file extension via pathinfo($filename, PATHINFO_EXTENSION), so a user with api.media.write permission can upload a file with a double extension such as shell.php.jpg to bypass the dangerous extensions blocklist. The web server may then execute the file as PHP, resulting in remote code execution.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f558729f6e9ab0cc18c02fb3fbe9d57d0beb0b42f91c7aa066e9c9ea0802d471
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/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:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"grav","vendor":"getgrav","versions":[{"lessThan":"1.0.3","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"1.0.3","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/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:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-434","description":"Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"GitHub Security Advisory (GHSA-66v2-vxxf-xc3v)","tags":["vendor-advisory"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-66v2-vxxf-xc3v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-66v2-vxxf-xc3v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/adp/0/references/0
{"name":"VulnCheck Advisory: Grav before 1.0.3 Remote Code Execution via File Upload Extension Bypass","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/grav-before-remote-code-execution-via-file-upload-extension-bypass"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:cc69553ca5026e47bc21bddbda3fa5c5fdfe1e37df05935c0d88395b287a0fe7 · sha256:f2c2c0662f83f0a3… · /containers/cna/references/1

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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