CVE-2026-57957

Description

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 read credentialed responses.

References

https://www.vulncheck.com/advisories/papermark-cors-misconfiguration-in-viewer-upload-endpoint

https://github.com/papermark/papermark/issues/2178

https://github.com/AstoKr/papermark/pull/1

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4