CVE-2026-57957

MediumCVSS 4.7/10Last modified Jul 14, 2026

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.

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Weakness enumeration

CWE-942

Affected software

No affected versions have been published.

Timeline

Published: Jun 29, 2026
Last modified: Jul 14, 2026
NVD status: Deferred

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