Medium severity · published Oct 10, 2025
CVE-2025-61505
e107 CMS thru 2.3.3 are vulnerable to insecure deserialization in the `install.php` script
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
E1
E107 · E107
through 2.3.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-61505
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-61505
Product
https://github.com/e107inc/e107/blob/master/install.php
Mitigation
https://xancatos.org/cve202561505
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