CVE-2019-9858
Remote code execution was discovered in Horde Groupware Webmail 5.2.22 and 5.2.17.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 18.8%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
Remote code execution was discovered in Horde Groupware Webmail 5.2.22 and 5.2.17. Horde/Form/Type.php contains a vulnerable class that handles image upload in forms. When the Horde_Form_Type_image method onSubmit() is called on uploads, it invokes the functions getImage() and _getUpload(), which uses unsanitized user input as a path to save the image. The unsanitized POST parameter object[photo][img][file] is saved in the $upload[img][file] PHP variable, allowing an attacker to manipulate the $tmp_file passed to move_uploaded_file() to save the uploaded file. By setting the parameter to (for example) ../usr/share/horde/static/bd.php, one can write a PHP backdoor inside the web root. The static/ destination folder is a good candidate to drop the backdoor because it is always writable in Horde installations. (The unsanitized POST parameter went probably unnoticed because it's never submitted by the forms, which default to securely using a random path.)
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 18.83% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- horde/groupware · debian/debian linux
- Source
- cve@mitre.org
EPSS 18.8% 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.
References
- http://packetstormsecurity.com/files/152476/Horde-Form-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2019/06/msg00007.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Jun/31Mailing List, Third Party Advisory
- https://ssd-disclosure.com/?p=3814&preview=trueExploit, Third Party Advisory
- https://www.debian.org/security/2019/dsa-4468Third Party Advisory
- http://packetstormsecurity.com/files/152476/Horde-Form-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
- https://lists.debian.org/debian-lts-announce/2019/06/msg00007.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Jun/31Mailing List, Third Party Advisory
- https://ssd-disclosure.com/?p=3814&preview=trueExploit, Third Party Advisory
- https://www.debian.org/security/2019/dsa-4468Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.