What’s Vulnerable › Vulnerabilities

CVE-2018-9999

• Severity: medium (CVSS 5.4 v3.0)
• 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: 2018-04-18 · updated 2026-06-17
• Weakness: CWE-79

Description

In Zulip Server versions before 1.7.2, there was an XSS issue with user uploads and the (default) LOCAL_UPLOADS_DIR storage backend.

Affected products

• zulip: before 1.7.2 — fixed in 1.7.2

How to fix

Upgrade to a fixed version: zulip 1.7.2. Check the vendor advisory for mitigations.

References

• https://blog.zulip.org/2018/04/12/zulip-1-7-2-released/
• https://blog.zulip.org/2018/04/12/zulip-1-7-2-released/

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