PT-2025-21585 · Zulip · Zulip

Timabbott · Published 2025-05-15 · Updated 2025-08-27 · CVE-2025-47930

Positive Technologies (AI Summary)

CVSS v4.0

5.3

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions: Zulip versions 10.0 through 10.2

Description: The issue concerns the "Who can create public channels" access control mechanism in Zulip, which can be circumvented by creating a private or web-public channel and then changing the channel privacy to public. A similar technique can be used to create private channels without permission, though this requires either using the API or modifying the HTML.

Recommendations: For versions 10.0 through 10.2, update to version 10.3 to resolve the issue.

Exploit

Fix

LPE

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2025-47930

GHSA-RQG7-XFQG-V7Q5

Affected Products

Zulip

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/47xxx/CVE-2025-47930.json · Exploit
• https://github.com/zulip/zulip/commit/d2ff4bda4c3efa30fc3ab1f151255cfdbf370f78 · Patch
• https://osv.dev/vulnerability/CVE-2025-47930 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-47930 · Security Note
• https://github.com/zulip/zulip/security/advisories/GHSA-rqg7-xfqg-v7q5 · Note
• https://zulip.readthedocs.io/en/latest/overview/changelog.html#zulip-server-10-3 · Note
• https://t.me/cveNotify/133638 · Telegram Post
• https://twitter.com/CVEnew/status/1923235067469398130 · Twitter Post
• https://zulip.com/help/configure-who-can-create-channels · Note
• https://t.me/cvenotify/122456 · Telegram Post
• https://t.me/cvetracker/23966 · Telegram Post