CVE-2026-104471

YesWiki before 4.6.7 contains an unrestricted file upload vulnerability that allows authenticated admins to write remote files into the web-accessible files/ directory via Bazar CSV import preview. Attackers can import a CSV whose file or image field references a remote .php URL, which is saved without extension checks and executed as server-side code.

CVSS 4.0

8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-25)

CWE

CWE-434

Published

2026-10-02

Modified

2026-10-02

Record from

the NVD, synced 2026-10-19

References

• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v3gq-c7c6-mxw3
• https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-unrestricted-file-upload-via-bazar-csv-import
• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-v3gq-c7c6-mxw3

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