How severe is CVE-2020-9343?

CVE-2020-9343 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-9343 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9343?

CVE-2020-9343 affects Signotec Signopad-api/web. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9343?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-9343 published?

CVE-2020-9343 was published on 2020-03-20 and last updated on 2026-06-17.

CVE-2020-9343

CVE-2020-9343 is a medium-severity vulnerability in Signotec Signopad-api/web with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Signotec Signopad-api/web
Published: 2020-03-20
Last modified: 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.

Frequently asked questions

What is CVE-2020-9343?: 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.
How severe is CVE-2020-9343?: CVE-2020-9343 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-9343 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9343?: CVE-2020-9343 affects Signotec Signopad-api/web. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9343?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-9343 published?: CVE-2020-9343 was published on 2020-03-20 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:signotec:signopad-api\/web:*:*:*:*:*:*:*:*

More vulnerabilities in Signotec Signopad-api/web

CVE-2020-9345 — Medium (CVSS 6.5): An issue was discovered in signotec signoPAD-API/Web (formerly Websocket Pad Server) before 3.1.1 on Windows. It is…

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