CVE-2020-8866
This vulnerability allows remote attackers to create arbitrary files on affected installations of Horde Groupware Webmail Edition 5.2.22.
Does this matter?
2 public exploits are published in Exploit-DB, so the technical barrier is gone even though the severity is medium and EPSS is 9.6%. Treat it as high on anything reachable from the internet.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 9.58% probability · 95th percentile
- Public exploits
- 2 in Exploit-DB · first 11 March 2020
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- horde/groupware · horde/horde form · debian/debian linux
- Source
- zdi-disclosures@trendmicro.com
EPSS 9.6% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.