CVE-2020-12637

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-05-09 · updated 2026-06-17
Weakness: CWE-295

Description

Zulip Desktop before 5.2.0 has Missing SSL Certificate Validation because all validation was inadvertently disabled during an attempt to recognize the ignoreCerts option.

Affected products

Zulipchat Zulip Desktop: from 0.5.10 before 5.2.0 — fixed in 5.2.0

How to fix

Upgrade to a fixed version: Zulipchat Zulip Desktop 5.2.0. Check the vendor advisory for mitigations.

References

https://blog.zulip.org/2020/05/06/zulip-desktop-5-2-0-security-release/
https://blog.zulip.org/2020/05/06/zulip-desktop-5-2-0-security-release/

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