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CVE-2025-61505

MediumPublished

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...

Published: Oct 10, 2025
Updated: Feb 3, 2026
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

6.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS probability estimate

0.4%

Low · next 30 days

Percentile: 29.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2025-61505Research
Insecure Deserialization in e107 CMS install.php

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