CVE-2020-8866

MEDIUM
6.5
CVSS Score
Published: March 23, 2020 at 08:15 PM UTC
Updated: June 17, 2026 at 03:27 AM UTC
3 products affected across 2 vendorsDebian LinuxGroupwareHorde Form

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Severity
MEDIUM6.5
Exploit prediction
EPSS 10%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.0.20
Affected range stops below 2.0.20, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

Mailing Listx_refsource_MLISTThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00036.html
x_refsource_MISCMailing ListVendor Advisory
https://lists.horde.org/archives/announce/2020/001288.html
x_refsource_MISCThird Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-20-275/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-434

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