CVE-2021-32703

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the shareinfo endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.

• CWE-799
• CWE-307

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9pThird Party Advisory
• https://github.com/nextcloud/server/pull/26945Patch, Third Party Advisory
• https://hackerone.com/reports/1173684Permissions Required
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
• https://security.gentoo.org/glsa/202208-17Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9pThird Party Advisory
• https://github.com/nextcloud/server/pull/26945Patch, Third Party Advisory
• https://hackerone.com/reports/1173684Permissions Required
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BVZS26RDME2DYTKET5AECRIZDFUGR2AZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J63NBVPR2AQCAWRNDOZSGRY5II4WS2CZ/
• https://security.gentoo.org/glsa/202208-17Third Party Advisory

Published

Jul 12, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

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