PT-2026-45357 · Soplanning · Soplanning

Łukasz Jaworski · Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-40544

Mitre

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

SOPlanning is vulnerable to Stored Cross-Site Scripting (XSS) via /process/upload backup endpoint. An authenticated attacker with access to the backup functionality can upload a crafted ZIP archive containing a malicious user.csv file with embedded JavaScript. The injected code is executed in the victim’s browser when a user clicks the Edit button for the malicious backup.

This issue affects SOPlanning version 1.55 and below.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-40544

Affected Products

Soplanning

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-40544 · Security Note
• https://cert.pl/en/posts/2026/06/CVE-2026-40543 · Note
• https://soplanning.org/en · Note