CVE-2026-25923

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Source
https://cve.org/CVERecord?id=CVE-2026-25923
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25923.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-25923
Aliases
  • GHSA-wr9p-3c3g-78fw
Published
2026-02-09T21:56:02.862Z
Modified
2026-03-14T12:47:37.826367Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Phar Deserialization leading to Arbitrary File Deletion in my little forum
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-434",
        "CWE-502"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25923.json"
}
References

Affected packages

Git / github.com/my-little-forum/mylittleforum

Affected ranges

Type
GIT
Repo
https://github.com/my-little-forum/mylittleforum
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a8fc667ece9301506a739fd62dc2b444e8485a22

Affected versions

2.*
2.3.99.3
2.4
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4.8
2.4.99.1
2.4.99.3
20220508.*
20220508.1
20220509.*
20220509.1
20220517.*
20220517.1
20220529.*
20220529.1
20220803.*
20220803.1
20240729.*
20240729.1
20240827.*
20240827.1
20241215.*
20241215.1
20250323.*
20250323.1
20250422.*
20250422.1
20250921.*
20250921.1
20251010.*
20251010.1
20251021.*
20251021.1
20251129.*
20251129.1
v2.*
v2.2
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2.7
v2.2.8
v2.3
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.3.6
v2.3.6.1
v2.3.7
v2.3.7beta
v2.3.7beta2
v2.3.99.2
v2.3.99.3
v2.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-25923.json"