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CVE-2026-57957

Papermark through 0.22.0 contains a cross-origin resource sharing (CORS) misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cross-origin requests by exploiting the TUS-based viewer upload endpoint reflecting arbitrary request Origins with Access-Control-Allow-Credentials set to true. Attackers can lure authenticated victims to malicious pages that silently issue credentialed cross-origin requests to upload arbitrary files into victim datarooms and
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1ac1868671e0edf790b19876622f4aa7e552858e4c65e108317a079da296a756
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":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:github/papermark/papermark","product":"papermark","repo":"https://github.com/papermark/papermark","vendor":"papermark","versions":[{"lessThanOrEqual":"0.22.0","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-942","description":"Permissive Cross-domain Security Policy with Untrusted Domains","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"Findings Summary","tags":["issue-tracking"],"url":"https://github.com/AstoKr/papermark/pull/1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/references/1
{"name":"Researcher Disclosure","tags":["issue-tracking"],"url":"https://github.com/papermark/papermark/issues/2178"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/papermark-cors-misconfiguration-in-viewer-upload-endpoint"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a5ce8ee1932378ec8e54e0f0fbf3f61d6805766acab477782b1edd68751aced4 · sha256:cdac65c7e02480ec… · /containers/cna/references/2

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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