CVE-2026-40548: SOPlanning unrestricted file upload in backup functionality

CVE-2026-40548 · Severity: info · CVSS 6.4 · Published 2026-06-01

SOPlanning is an online project management and team scheduling tool. A security flaw in the backup system allows an authorized user to upload malicious files disguised within a backup archive. If combined with other known flaws, this could allow an attacker to take control of the server, potentially leading to data theft or service disruption.

Technologies: SOPlanning. Vendors: SOPlanning.

Quick answers

Is CVE-2026-40548 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-40548 being exploited in the wild.
How severe is CVE-2026-40548?
Informational severity, with a CVSS score of 6.4, published 1 June 2026.
Which products and versions are affected?
SOPlanning 1.55 and below.
Is there a fix for CVE-2026-40548?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-40548 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-40548?
Check whether you run SOPlanning at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

SOPlanning version 1.55 and below contains an unrestricted file upload vulnerability (CWE-434) in its backup functionality. The application does not validate the extensions of files contained within uploaded ZIP archives. An authenticated attacker with access to backup features can include a malicious file (such as a PHP script) alongside the expected 'user.csv' file. When combined with a path traversal vulnerability (CVE-2026-40547), the attacker can place the malicious file into a web-accessible directory and execute it, leading to remote code execution. Access to the backup functionality is required, which typically requires high privileges, though CVE-2026-40543 may allow unauthorized access to these endpoints.

Affected products

  • SOPlanning SOPlanning 1.55 and below

Timeline

  • 2026-06-01: disclosed: Vulnerability disclosed by CERT Polska
  • 2026-06-01: advisory: CVE-2026-40548 published

References

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