CVE-2020-9444
CVE-2020-9444 is a medium-severity vulnerability in Zulip Zulip Server with a CVSS 3.x base score of 6.1. 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-1021.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 5.8
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-1021
- Affected product: Zulip Zulip Server
- Published:
- Last modified:
Description
Zulip Server before 2.1.3 allows reverse tabnabbing via the Markdown functionality.
Frequently asked questions
- What is CVE-2020-9444?
- Zulip Server before 2.1.3 allows reverse tabnabbing via the Markdown functionality.
- How severe is CVE-2020-9444?
- CVE-2020-9444 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2020-9444 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-2020-9444?
- CVE-2020-9444 affects Zulip Zulip Server. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-9444?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-9444 published?
- CVE-2020-9444 was published on 2020-04-20 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*
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