CVE-2026-57957 — Papermark 0.22.0 - CORS Misconfiguration in Viewer Upload Endpoint
Papermark through 0.22.0 contains a cross-origin resource sharing (CORS) misconfiguration vulnerability that allows unauthenticated remote attackers to perform credentialed cros…
Published: 2026-06-29 · CVSS: 2.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7