CVE-2026-40548

Description

SOPlanning does not verify uploaded file extension. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a legitimate user.csv file alongside a malicious file, which is extracted on the server. When combined with CVE-2026-40547 (Path Traversal), the malicious file (e.g., a PHP script) can be placed in a web-accessible location and executed via the browser. This issue affects SOPlanning version 1.55 and below.

PUBLISHED Reserved 2026-04-14 | Published 2026-06-01 | Updated 2026-06-01 | Assigner CERT-PL

Problem types

CWE-434: Unrestricted Upload of File with Dangerous Type

Product status

Credits

Łukasz Jaworski finder

References

cert.pl/en/posts/2026/06/CVE-2026-40543 third-party-advisory

www.soplanning.org/en/ product

cve.org (CVE-2026-40548)

nvd.nist.gov (CVE-2026-40548)

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