Arbitrary file upload in My-little-forum Mylittleforum

CVE-2026-25923

my little forum is a PHP and MySQL based internet forum that displays the messages in classical threaded view. Prior to 20260208.1, the application fails to filter the phar:// protocol in URL validation, allowing attackers to upload a mali…

Vulnerability class: Unrestricted File Upload

EPSS: 0.004 (34.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-25923?
CVE-2026-25923 is a critical-severity vulnerability in My-little-forum Mylittleforum, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.1/10. Published 2026-02-09.
How severe is CVE-2026-25923?
Critical severity. CVSS v3 base score is 9.1 out of 10.