CVE-2021-27860KEV · OVERDUE

Arbitrary file upload vulnerability in FatPipe software

Critical · published December 8, 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 98.6th percentile for exploit probability.

1735
days past CISA
deadline
CVSS v3.1
9.8
EPSS
40%
Percentile
98.6
In the wild
Confirmed
What it is

🚨 A total game-changer in the FatPipe WARP and IPVPN software! Unauthenticated attackers can upload files anywhere in the system—it's like handing them the keys to your server's filing cabinet! 🔥 Think of it like a restaurant manager who forgot to lock the door—anyone can stroll in and rearrange the kitchen, or worse, tamper with the ingredients without anyone knowing. This flaw allows an attacker to upload any file, giving them a direct path to wreak havoc. With this vulnerability, a remote hacker can upload malicious files, potentially gaining full control over the server. They could steal sensitive data, install backdoors, or disrupt services entirely—an absolutely devastating scenario for any organization relying on these systems.

Put simply

Think of it like a restaurant manager who forgot to lock the door—anyone can stroll in and rearrange the kitchen, or worse, tamper with the ingredients without anyone knowing. This flaw allows an attacker to upload any file, giving them a direct path to wreak havoc. This vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software allows unauthenticated users to bypass restrictions and upload files to arbitrary locations on the filesystem, which could lead to severe consequences including remote code execution.

What to do

With this vulnerability, a remote hacker can upload malicious files, potentially gaining full control over the server. They could steal sensitive data, install backdoors, or disrupt services entirely—an absolutely devastating scenario for any organization relying on these systems. Immediate action is crucial: upgrade to versions 10.1.2r60p92 or 10.2.2r44p1 to patch this vulnerability. Also, review your access controls to ensure only authorized users have upload permissions. You've got this! Follow these steps, and you'll be one step closer to securing your network like a true security hero! 🛡️

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
0.39680 · 98.6th percentile
Published
2021-12-08T16:15Z
KEV added
2022-01-10 · due 2022-01-24
EPSS history
Timeline
  • 10 JAN 00:00Z
    Added to CISA KEV — remediate by Jan 24
    kev
  • 08 DEC 16:15Z
    Arbitrary file upload vulnerability in FatPipe software
    cvelistv5