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CVE-2026-58654

The Grav API plugin (getgrav/grav-plugin-api) 1.0.0 contains an unrestricted file upload vulnerability in the avatar upload endpoint (/api/v1/users/user/avatar). The endpoint validates only the client-declared MIME type (getClientMediaType) beginning with 'image/' and does not inspect the actual file content or restrict the resulting extension, allowing an authenticated user to store arbitrary content — including PHP code, SVG with embedded JavaScript, and polyglot payloads — under user/accounts
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:72659501dd0f9bf1962f3b40102dc6bbea0fc58e17b418dd49af00d4f1f7e4f8
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","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/metrics/1/cvssV3_1

{"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:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Grav","vendor":"Grav","versions":[{"lessThan":"1.0.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"1.0.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/metrics/1/cvssV3_1
{"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:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/metrics/0/cvssV4_0

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:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-xc64-vh46-vph6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-xc64-vh46-vph6)","tags":["vendor-advisory"],"url":"https://github.com/getgrav/grav/security/advisories/GHSA-xc64-vh46-vph6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Grav - Arbitrary File Upload via Avatar Endpoint","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/grav-arbitrary-file-upload-via-avatar-endpoint"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:30723af69d7f0017c80f1acb584422a7dff1a8b0263377647e59a0e64b77e492 · sha256:6d73bda1d7166794… · /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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