TI-2020-07555 Aliases CVE-2020-9443 GHSA-mmgh-298q-2qxp

Zulip Desktop before 4.0.3 loaded untrusted content in an Electron webview with web…

LOW 28CWE-79Published 2020-03-18 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

Zulip Desktop before 4.0.3 loaded untrusted content in an Electron webview with web security disabled, which can be exploited for XSS in a number of ways. This especially affects Zulip Desktop 2.3.82.

Why it matters now

EPSS 0.00641 50th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:zulipchat:zulip_desktop::::::::	before 4.0.3	Vulnerable	Zulipchat

cpe:2.3:a:zulipchat:zulip_desktop:*:*:*:*:*:*:*:* Versions before 4.0.3 Vulnerable ·Zulipchat

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-9443
2026-10-03 Alias added: GHSA-mmgh-298q-2qxp
2026-10-21 EPSS moved to the 50th–90th percentile

References

Advisory 1

https://blog.zulip.org/2020/02/29/zulip-desktop-4-0-3-security-release/

TI-2020-10047 Zulip Desktop before 5.2.0 has Missing SSL Certificate Validation because all validation… CVSS 3.1CRITICAL 9.8
TI-2020-15062 Zulip Desktop before 5.4.3 allows XSS because string escaping is mishandled during… CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences