CVE-2020-9343

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-03-20 · updated 2026-06-17

Description

An issue was discovered in signotec signoPAD-API/Web (formerly Websocket Pad Server) before 3.1.1 on Windows. It is possible to perform a Denial of Service attack because the implementation doesn't limit the parsing of nested JSON structures. If a victim visits an attacker-controlled website, this vulnerability can be exploited via WebSocket data with a deeply nested JSON array.

Affected products

Signotec Signopad-Api/Web: before 3.1.1 — fixed in 3.1.1

How to fix

Upgrade to a fixed version: Signotec Signopad-Api/Web 3.1.1. Check the vendor advisory for mitigations.

References

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-053.txt
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2019-053.txt

Get alerted when CVE-2020-9343 or the next vulnerability affects your stack