CVE-2021-22941KEV · OVERDUECWE-284

Citrix ShareFile Improper Access Control Vulnerability

Critical · published September 23, 2021

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 99.0th percentile for exploit probability.

1653
days past CISA
deadline
CVSS v3.1
9.8
EPSS
54%
Percentile
99.0
In the wild
Confirmed
What it is

🚨 A tiny misstep in access control could let an attacker slip into your Citrix ShareFile storage zones like a ghost at a party! 🔥 Think of the storage zones controller as a VIP lounge at a club. If the bouncer fails to check IDs, anyone could waltz in and mingle with the important guests, causing chaos before anyone realizes what's happening. An unauthenticated attacker could potentially exploit this vulnerability to take complete control of the storage zones controller, accessing sensitive files and compromising your data security. This could lead to a catastrophic loss of trust and financial damage, making it a nightmare scenario!

Put simply

Think of the storage zones controller as a VIP lounge at a club. If the bouncer fails to check IDs, anyone could waltz in and mingle with the important guests, causing chaos before anyone realizes what's happening. This vulnerability arises from improper access control in Citrix ShareFile's storage zones controller, allowing remote attackers to access the system without proper authentication.

What to do

An unauthenticated attacker could potentially exploit this vulnerability to take complete control of the storage zones controller, accessing sensitive files and compromising your data security. This could lead to a catastrophic loss of trust and financial damage, making it a nightmare scenario! To remediate this vulnerability, upgrade your Citrix ShareFile storage zones controller to version 5.11.20 or later immediately. Additionally, review your access control settings to ensure they align with best practices and enhance your overall security posture. You've got this! Patch up and keep your data safe! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.53585 · 99.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2021-09-23T12:44Z
KEV added
2022-03-25 · due 2022-04-15
EPSS history
Timeline
  • 25 MAR 00:00Z
    Added to CISA KEV — remediate by Apr 15
    kev
  • 23 SEP 12:44Z
    Improper Access Control in Citrix ShareFile storage zones controller before 5.11.20 may allow an unauthenticated attacker to remotely compromise the storage…
    cvelistv5