CVE-2020-12637
CVE-2020-12637 is a critical-severity vulnerability in Zulipchat Zulip Desktop with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-295
- Affected product: Zulipchat Zulip Desktop
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2020-12637?
- 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.
- How severe is CVE-2020-12637?
- CVE-2020-12637 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2020-12637 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-12637?
- CVE-2020-12637 affects Zulipchat Zulip Desktop. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-12637?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2020-12637 published?
- CVE-2020-12637 was published on 2020-05-09 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:zulipchat:zulip_desktop:*:*:*:*:*:*:*:*
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