PT-2026-30211 · Zulip · Zulip

Odgrso · CVE-2026-25742 · Published 2026-04-03 · Updated 2026-07-24

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Zulip versions 1.4.0 through 11.5

Description An issue exists where attachments from web-public streams remain accessible anonymously even after spectator access is disabled via enable spectator access or WEB PUBLIC STREAMS ENABLED. Additionally, the '/users/me//topics' endpoint remains reachable anonymously, allowing unauthorized retrieval of topic history for web-public streams.

Recommendations Update to version 11.6.

Exploit

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2026-25742

GHSA-F47P-XJQQ-G28W

Affected Products

Zulip

References · 8

• 🔥 https://github.com/zulip/zulip/security/advisories/GHSA-f47p-xjqq-g28w · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25742.json · Exploit
• https://github.com/zulip/zulip/commit/41e23347b5218b3b0397a55176c7d97396735bae · Patch
• https://github.com/zulip/zulip/commit/3c045414299680b9f5dca7d76cf6cef6121c0236 · Patch
• https://osv.dev/vulnerability/CVE-2026-25742 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-25742 · Security Note
• https://github.com/zulip/zulip/releases/tag/11.6 · Note
• https://t.me/cveNotify/222500 · Telegram Post