CVE-2025-61505

e107 CMS thru 2.3.3 are vulnerable to insecure deserialization in the `install.php` script

Medium · published October 10, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
28.4
In the wild
Unconfirmed
What it is

e107 CMS thru 2.3.3 are vulnerable to insecure deserialization in the `install.php` script. The script processes user-controlled input in the `previous_steps` POST parameter using `unserialize(base64_decode())` without validation, allowing attackers to craft malicious serialized data. This could lead to remote code execution, arbitrary file operations, or denial of service, depending on available PHP object gadgets in the codebase.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00358 · 28.4th percentile
Published
2025-10-10T00:00Z
EPSS history
Timeline
  • 10 OCT 00:00Z
    e107 CMS thru 2.3.3 are vulnerable to insecure deserialization in the `install.php` script
    cvelistv5