CVE-2020-8866

This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22. Authentication is required to exploit this vulnerability. The specific flaw exists within add.php. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the www-data user. Was ZDI-CAN-10125.

• CWE-434
• CWE-434

• https://lists.debian.org/debian-lts-announce/2020/03/msg00036.htmlMailing List, Third Party Advisory
• https://lists.horde.org/archives/announce/2020/001288.htmlMailing List, Vendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-20-275/Third Party Advisory, VDB Entry
• https://lists.debian.org/debian-lts-announce/2020/03/msg00036.htmlMailing List, Third Party Advisory
• https://lists.horde.org/archives/announce/2020/001288.htmlMailing List, Vendor Advisory
• https://www.zerodayinitiative.com/advisories/ZDI-20-275/Third Party Advisory, VDB Entry

Published

Mar 23, 2020

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.
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