Trending
CVE-2026-24050

CVE detail

CVE-2026-24050

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.

CVSS 1.1 · LowBuzz score 26.1

Buzz score

Why this CVE is surfacing

Buzz score total 26.1

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 16.1 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

16.1

4 evidence mentions in the snapshot

Diversity score

10.0

2 sources across 2 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

4 source links · newest first

https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-11-5zulip.readthedocs.io
No excerpt available.
Release Noteszulip.readthedocs.ioFeb 6, 2026, 7:16 PM
https://github.com/zulip/zulip/security/advisories/GHSA-56qv-8823-6fq9github.com
No excerpt available.
Exploitgithub.comFeb 6, 2026, 7:16 PM
https://github.com/zulip/zulip/releases/tag/11.5github.com
No excerpt available.
Exploitgithub.comFeb 6, 2026, 7:16 PM
https://github.com/zulip/zulip/commit/e6093d9e4788f4d82236d856c5ed7b16767886a7github.com
No excerpt available.
Exploitgithub.comFeb 6, 2026, 7:16 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence

CVE-2025-52559
Zulip is an open-source team chat application. From versions 2.0.0-rc1 to before 10.4 in Zulip Server, the /digest/ URL of a server shows a preview of what the email weekly digest…
CVSS 6.8 · Medium
4 mentions
CVE-2023-33186
Zulip is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat to make remote work productive and delightful. The main…
CVSS 8.2 · High
CVE-2022-23656
Zulip is an open source team chat app. The `main` development branch of Zulip Server from June 2021 and later is vulnerable to a cross-site scripting vulnerability on the recent t…
CVSS 4.6 · Medium
CVE-2020-12759
Zulip Server before 2.1.5 allows reflected XSS via the Dropbox webhook.
CVSS 6.1 · Medium
CVE-2020-9445
Zulip Server before 2.1.3 allows XSS via the modal_link feature in the Markdown functionality.
CVSS 6.1 · Medium
CVE-2020-10935
Zulip Server before 2.1.3 allows XSS via a Markdown link, with resultant account takeover.
CVSS 5.4 · Medium

External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-24050.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:a:zulip:zulip_serverSearch this product on Shodan

Exact CVE query

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Shodan's exact vuln: filter is separate from the product searches above and requires an eligible paid Shodan plan.

vuln:CVE-2026-24050Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Unavailable

Published

Feb 6, 2026

Modified

Jun 17, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs

Vendor classifications

How this vector reads

CVSS 4.0 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Attack Requirements (AT): None. No prerequisite deployment or execution condition is required.
Privileges Required (PR): High. The attacker needs significant administrative privileges.
User Interaction (UI): Passive. A targeted user must unknowingly interact with the vulnerable system.
Vulnerable System Confidentiality (VC): None. There is no direct impact to this security property.
Vulnerable System Integrity (VI): None. There is no direct impact to this security property.
Vulnerable System Availability (VA): None. There is no direct impact to this security property.
Subsequent System Confidentiality (SC): Low. There is a limited impact to this security property.
Subsequent System Integrity (SI): Low. There is a limited impact to this security property.
Subsequent System Availability (SA): None. There is no direct impact to this security property.

Optional CVSS v4 metrics remain in the raw vector; only base metrics are expanded here.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses