Papermark through 0.22.0 Missing Authorization in Data Room Viewer Group API

Advisories

Papermark through 0.22.0 Missing Authorization in Data Room Viewer Group API

Severity: low
Date: 10/15/2026
Affecting: Papermark <= 0.22.0
CVE: CVE-2026-111350
CWE: CWE-862 Missing Authorization
CVSS: 2.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
References: https://hackmd.io/@hieuPenguinnn/papermark-dataroom-group-delete-missing-authz
https://github.com/papermark/papermark/blob/v0.22.0/pages/api/teams/%5BteamId%5D/datarooms/%5Bid%5D/groups/%5BgroupId%5D/index.ts#L155-L190
https://github.com/papermark/papermark/blob/v0.22.0/pages/api/teams/%5BteamId%5D/datarooms/%5Bid%5D/groups/%5BgroupId%5D/links.ts#L52-L56
https://github.com/papermark/papermark/commit/b81cf62f390cda112f35538eb09e54b5f728b74a
https://github.com/papermark/papermark/commit/7fa52b23944823a9e74402fca8e48d644239bc0b
https://github.com/papermark/papermark
Credit: hieuPenguinnn
Description: Papermark through 0.22.0 contains a missing authorization vulnerability in the data room viewer group API that allows authenticated users to delete other teams' viewer groups and share links. Attackers who know a victim team's data room and group identifiers can send DELETE requests, read group links, or rewrite group document permissions across teams.

Ready to get Started?

Explore VulnCheck, a next-generation Cyber Threat Intelligence platform, which provides exploit and vulnerability intelligence to help you prioritize and remediate vulnerabilities that matter.

Vulnerability Prioritization
Prioritize vulnerabilities that matter based on the threat landscape and defer vulnerabilities that don't.
Early Warning System
Real-time alerting of changes in the vulnerability landscape so that you can take action before the attacks start.

Schedule a Demo