CVE-2017-16651KEV · OVERDUE

Roundcube Webmail File Disclosure Vulnerability

High · published November 9, 2017

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.8. It is confirmed in active exploitation. It sits in the 98.8th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
7.8
EPSS
46%
Percentile
98.8
In the wild
Confirmed
What it is

🚨 A valid username and password can lead an attacker to unauthorized file access on your server! 🔥 Think of it like a hotel room where the door is unlocked, allowing someone to stroll in and rummage through your personal belongings. In this case, the attack exploits vulnerable file-based plugins to access sensitive configuration files without any extra security checks. This vulnerability could be absolutely devastating! An attacker with an active session can access files that should remain hidden, leading to compromised configurations and potentially full control over your webmail system. Imagine someone getting hold of your secret notes – yikes!

Put simply

Think of it like a hotel room where the door is unlocked, allowing someone to stroll in and rummage through your personal belongings. In this case, the attack exploits vulnerable file-based plugins to access sensitive configuration files without any extra security checks. CVE-2017-16651 allows authenticated users to access arbitrary files via specific requests related to the file-based attachment plugins in Roundcube Webmail, which lacks proper authorization checks.

What to do

This vulnerability could be absolutely devastating! An attacker with an active session can access files that should remain hidden, leading to compromised configurations and potentially full control over your webmail system. Imagine someone getting hold of your secret notes – yikes! To secure your system, upgrade to Roundcube Webmail version 1.1.10, 1.2.7, or 1.3.3 or later. Additionally, review your file handling and implement stringent access controls to avoid similar issues in the future. You've got this! With these steps, you'll reinforce your defenses and keep your webmail safe from prying eyes. 🛡️

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.45742 · 98.8th percentile
Published
2017-11-09T14:00Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 09 NOV 14:00Z
    Roundcube Webmail before 1.1.10, 1.2.x before 1.2.7, and 1.3.x before 1.3.3 allows unauthorized access to arbitrary files on the host's filesystem, including…
    cvelistv5