CVE Explorer

CVE-2026-53948

Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, insufficient validation of the client-supplied Content-Type on Ghost's Admin API file upload endpoint allowed uploaded files to be served from the site with an attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the site, this could have been used to facilitate stored cross-site scripting against site visitors or staff. This vulnerability is fixed in 6.2

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d24b0be8904db05dead3099fd35c724b463fac3371af2d23deb278cf6c692dde

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"Ghost","vendor":"TryGhost","versions":[{"status":"affected","version":">= 6.19.4, < 6.21.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4160ccae52bb1b2f081952d15ebbee8833b370602a95dfe80ab2e3de3512895f · sha256:7e3206c2d2fab14b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:4160ccae52bb1b2f081952d15ebbee8833b370602a95dfe80ab2e3de3512895f · sha256:7e3206c2d2fab14b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4160ccae52bb1b2f081952d15ebbee8833b370602a95dfe80ab2e3de3512895f · sha256:7e3206c2d2fab14b… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-944x-pm95-3jpr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-944x-pm95-3jpr"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4160ccae52bb1b2f081952d15ebbee8833b370602a95dfe80ab2e3de3512895f · sha256:7e3206c2d2fab14b… · /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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