Vulnerability · Published Jun 1, 2026 · Assigned by CERT-PL

CVE-2026-40548Unrestricted Upload of File with Dangerous Type in SOPlanning

Medium 6.4

In plain English

A medium-severity unrestricted file upload in SOPlanning from SOPlanning. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).

Severity (CVSS 4.0)6.4Medium

Exploit odds (30 days)0.3%top 76.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
SOPlanning	SOPlanning	0 – through 1.55

Weakness: CWE-434 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H

References

https://cert.pl/en/posts/2026/06/CVE-2026-40543 third-party-advisory
https://www.soplanning.org/en/ product