Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.7%
CVSS Severity
CVSS v3 Score 9.1
References
Products affected by CVE-2026-25923
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cpe:2.3:a:mylittleforum:my_little_forum:1.7
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cpe:2.3:a:mylittleforum:my_little_forum:2.2
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.1
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.2
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.3
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.4
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.5
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.6
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.7
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cpe:2.3:a:mylittleforum:my_little_forum:2.2.8
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cpe:2.3:a:mylittleforum:my_little_forum:2.3
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.1
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.2
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.3
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.4
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.5
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.6
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.6.1
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.7
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.99.2
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cpe:2.3:a:mylittleforum:my_little_forum:2.3.99.3
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cpe:2.3:a:mylittleforum:my_little_forum:2.4
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.1
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.10
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.11
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.12
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.13
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.14
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.15
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.16
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.17
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.18
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.18.1
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.19
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.19.1
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.2
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.20
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.3
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.4
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.5
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.6
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.7
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.8
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.9
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cpe:2.3:a:mylittleforum:my_little_forum:2.4.99.1