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CVE Vulnerability Details :
CVE-2026-25923
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-09 Feb, 2026 | 21:56
Updated At-11 Feb, 2026 | 21:20
Rejected At-
▼CVE Numbering Authority (CNA)
Phar Deserialization leading to Arbitrary File Deletion in my little forum

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 malicious Phar Polyglot file (disguised as JPEG) via the image upload feature, trigger Phar deserialization through BBCode [img] tag processing, and exploit Smarty 4.1.0 POP chain to achieve arbitrary file deletion. This vulnerability is fixed in 20260208.1.

Affected Products
Vendor
My-Little-Forum
Product
mylittleforum
Versions
Affected
  • < 20260208.1
Problem Types
TypeCWE IDDescription
CWECWE-434CWE-434: Unrestricted Upload of File with Dangerous Type
CWECWE-502CWE-502: Deserialization of Untrusted Data
Type: CWE
CWE ID: CWE-434
Description: CWE-434: Unrestricted Upload of File with Dangerous Type
Type: CWE
CWE ID: CWE-502
Description: CWE-502: Deserialization of Untrusted Data
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/My-Little-Forum/mylittleforum/security/advisories/GHSA-wr9p-3c3g-78fw
x_refsource_CONFIRM
https://github.com/My-Little-Forum/mylittleforum/releases/tag/20260208.1
x_refsource_MISC
Hyperlink: https://github.com/My-Little-Forum/mylittleforum/security/advisories/GHSA-wr9p-3c3g-78fw
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/My-Little-Forum/mylittleforum/releases/tag/20260208.1
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found