VulnerabilityDeferred

CVE-2026-40545

SOPlanning is vulnerable to Reflected XSS via the taches parameter.

MEDIUM 5.1EPSS 0.40%

Does this matter?

Lower severity and a low EPSS score (0.40%). Track it; it rarely justifies an emergency change on its own.

Description

SOPlanning is vulnerable to Reflected XSS via the taches parameter. An attacker can craft a malicious URL which, when opened by authenticated victim, results in arbitrary JavaScript execution in the victim’s browser. This issue affects SOPlanning version 1.55 and below.

CVSS 4.0: 5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.40% probability · 34th percentile
CISA KEV: Not listed
Weakness: CWE-79
Source: cvd@cert.pl

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.