CVE-2026-40544CWE-79

Stored XSS in SOPlanning

Medium · published June 1, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
33.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00405 · 33.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-01T09:03Z
EPSS history
Timeline
  • 01 JUN 09:03Z
    Stored XSS in SOPlanning
    cvelistv5