TI-2026-19378 Aliases CVE-2026-24050

Zulip affected by Stored XSS in user profile modal

LOW 7CWE-79Published 2026-02-06 · Updated 2026-02-09

Key facts

Attack vector: Network
Privileges required: High
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Zulip is an open-source team collaboration tool. From 5.0 to before 11.5, some administrative actions on the user profile were susceptible to stored XSS in group names or channel names. Exploiting these vulnerabilities required the user explicitly interacting with the problematic object. This vulnerability is fixed in 11.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00262 18th percentileScored 2026-11-07

Fix Fixed zulip (zulip): 11.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
zulip	zulip	5.0 to before 11.5	11.5	Patch available	CNA

zulip Vendorzulip Affected 5.0 to before 11.5 Fixed in 11.5 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:zulip:zulip_server::::::::	5.0 to before 11.5	Vulnerable	zulip

cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:* Versions 5.0 to before 11.5 Vulnerable ·zulip

Remediation

Fix · CNA zulip (zulip) Fixed in 11.5

Timeline

2026-10-02 Threatist record created from CVE-2026-24050

References

Patch 1

https://github.com/zulip/zulip/commit/e6093d9e4788f4d82236d856c5ed7b16767886a7

Advisory 1

https://github.com/zulip/zulip/security/advisories/GHSA-56qv-8823-6fq9

Other 2

TI-2024-37129 /api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server CVSS 4.0MEDIUM 6.9
TI-2022-06082 Multi-use invitations can grant access to other organizations in Zulip CVSS 3.1CRITICAL 9.8
TI-2019-13649 In Zulip Server versions from 1.7.0 to before 2.0.7, a bug in the new user signup process… CVSS 3.1CRITICAL 9.8
TI-2025-22659 Zulip Authentication Backend Configuration Bypass CVSS 3.1HIGH 8.2
TI-2024-24345 Zulip from 8.0 to 8.3 contains a memory leak vulnerability in the handling of popovers. CVSS 3.1HIGH 7.5
TI-2020-11848 Zulip Server 2.x before 2.1.7 allows eval injection if a privileged attacker were able to… CVSS 3.1HIGH 8.8

See all 39 →

Sources

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