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CVE-2020-8866

MediumPublished

This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22. Authentication is...

Published: Mar 23, 2020
Updated: Aug 4, 2024
Assigning CNA: zdi
Evidence observed: Mar 11, 2020

Primary CVSS

6.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS probability estimate

9.6%

Low · next 30 days

Percentile: 95.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Horde Groupware Webmail Edition 5.2.22 - PHP File InclusionExploit
Andrea Cardaci · php · Mar 11, 2020
Horde Groupware Webmail Edition 5.2.22 - PHAR LoadingExploit
Andrea Cardaci · php · Mar 11, 2020

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