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CVE-2026-58480

Blocksy Companion Pro plugin for WordPress before 2.1.47 contains an unauthenticated arbitrary file upload vulnerability that allows attackers to upload executable files by bypassing extension validation in the save_attachments function exposed through the Advanced Reviews feature. Attackers can exploit the Custom Fonts extension's flawed strpos() substring check by uploading double-extension filenames such as shell.woff2.php, causing the validation to pass on the substring match while the web s
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0d300f0a801f12f60159f6fc5210c573e3cb7188c9880fea7b3f96708abe0206
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":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityIm…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","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:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"Blocksy Companion","repo":"https://wordpress.org/plugins/blocksy-companion/","vendor":"Creative Themes","versions":[{"lessThanOrEqual":"2.1.46","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.1.47","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityIm…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","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:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /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:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Patchstack Advisory","tags":["third-party-advisory"],"url":"https://patchstack.com/database/wordpress/plugin/blocksy-companion/vulnerability/wordpress-blocksy-companion-plugin-2-1-46-unauthenticated-arbitrary-file-upload-vulnerability"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/references/1
{"name":"WordPress Plugin Page","tags":["product","patch"],"url":"https://wordpress.org/plugins/blocksy-companion/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/references/2
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/blocksy-companion-pro-unauthenticated-file-upload-via-save-attachments"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /containers/cna/references/3
{"name":"Wordfence Advisory","tags":["third-party-advisory"],"url":"https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/blocksy-companion/blocksy-companion-2146-unauthenticated-arbitrary-file-upload-via-blc-review-images-parameter"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9d14733160294e10b9445f76723eb2e89ab5895d93f6a01e5358350be79a44a5 · sha256:55d53f8ca728fe09… · /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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