CVE-2025-15009: liweiyi ChestnutCMS Filename upload FilenameUtils.getExtension unrestricted upload

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-12-22 · updated 2026-10-19
Weakness: CWE-284

Description

A flaw has been found in liweiyi ChestnutCMS up to 1.5.8. This vulnerability affects the function FilenameUtils.getExtension of the file /dev-api/common/upload of the component Filename Handler. Executing manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The exploit has been published and may be used.

Affected products

ChestnutCMS: through 1.5.8

References

https://github.com/yuccun/CVE/blob/main/ChestnutCMS-Arbitrary_File_Upload.md
https://github.com/yuccun/CVE/blob/main/ChestnutCMS-Arbitrary_File_Upload.md#vulnerability-proof
https://vuldb.com/?ctiid.337715
https://vuldb.com/?id.337715
https://vuldb.com/?submit.719590

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