Zulip up to 11.4 group name/channel name cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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2.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Zulip up to 11.4 and classified as problematic. Affected is an unknown function. Performing a manipulation of the argument group name/channel name results in cross site scripting. This vulnerability is cataloged as CVE-2026-24050. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Zulip up to 11.4. This affects an unknown part. The manipulation of the argument group name/channel name with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-24050 since 01/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 11.5 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch e6093d9e4788f4d82236d856c5ed7b16767886a7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 2.4
VulDB Meta Temp Score: 2.3

VulDB Base Score: 2.4
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Zulip 11.5
Patch: e6093d9e4788f4d82236d856c5ed7b16767886a7

Timelineinfo

01/20/2026 CVE reserved
02/06/2026 +17 days Advisory disclosed
02/06/2026 +0 days VulDB entry created
02/07/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-56qv-8823-6fq9
Status: Confirmed

CVE: CVE-2026-24050 (🔒)
GCVE (CVE): GCVE-0-2026-24050
GCVE (VulDB): GCVE-100-344739

Entryinfo

Created: 02/06/2026 21:32
Updated: 02/07/2026 09:22
Changes: 02/06/2026 21:32 (71), 02/07/2026 09:22 (1)
Complete: 🔍
Cache ID: 216::103

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