CVE-2020-12759
CVE-2020-12759 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-79.
Key facts
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (48th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Zulip Zulip Server
- Published:
- Last modified:
Description
Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.
Frequently asked questions
- What is CVE-2020-12759?
- Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.
- How severe is CVE-2020-12759?
- CVE-2020-12759 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-2020-12759 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-2020-12759?
- CVE-2020-12759 affects Zulip Zulip Server. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-12759?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-12759 published?
- CVE-2020-12759 was published on 2020-08-21 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*
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