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Vulnerabilities

Security fix · CVE-2025-47930

Zulip is an open-source team chat application.

Published May 15, 2025 · catalog updated May 16, 2025 · Zulip is an open-source

Check if you run it

No confirmed exploitation is on record for CVE-2025-47930. EPSS is 0.35%. Act only if a listed version of Zulip is an open-source is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Zulip is an open-source).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.35%
Remediation
Version ranges on file
Affected products
vendor zulip zulip 10.0, < 10.3

Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or modifying the HTML, as we do mark the "private" radio button as disabled in such cases. Version 10.3 contains a patch.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor zulip zulip 10.0, < 10.310.0, < 10.3

How to fix CVE-2025-47930

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-47930. EPSS is 0.35%. Act only if a listed version of Zulip is an open-source is installed.

Which versions are affected?

Compare what you have installed with zulip zulip 10.0, < 10.3 10.0, < 10.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.35%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 15, 2025 · EUVD

    Detected

    Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or

  2. May 16, 2025 · EUVD

    Updated

    Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A similar technique works for creating private channels without permission, though such a process requires either the API or

Sources

  • CVE.orgVulnerability recordCVE-2025-47930

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-47930

    30-day exploitation probability 0.4%

    first.org
  • EUVDVulnerability recordEUVD-2025-28135

    Zulip is an open-source team chat application. Starting in version 10.0 and prior to version 10.3, the "Who can create public channels" access control mechanism can be circumvented by creating a private or web-public channel, and then changing the channel privacy to public. A sim

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.