CVE-2017-0881

Name: CVE-2017-0881
Creator: NVD / NIST
Published: 2017-03-28T02:59:01.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.10%

Last modified Jun 17, 2026

CVE-2017-0881 is a vulnerability of currently unknown severity. An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. The issue affects all previously released versions of the Zulip server.. EPSS estimates a 1.10% chance of exploitation in the next 30 days.

Description

An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. The issue affects all previously released versions of the Zulip server.

Metrics

EPSS Probability

1.10%

61.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zulip	Zulip Server	< 1.4.3

References

http://www.securityfocus.com/bid/97159Third Party Advisory, Vendor Advisory
https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255fPatch, Third Party Advisory
https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJPatch, Release Notes, Third Party Advisory
http://www.securityfocus.com/bid/97159Third Party Advisory, Vendor Advisory
https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255fPatch, Third Party Advisory
https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJPatch, Release Notes, Third Party Advisory

Timeline

Published: Mar 28, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-0881?

How severe is CVE-2017-0881?

Severity scoring for CVE-2017-0881 is pending analysis. The EPSS model estimates a 1.10% probability of exploitation in the next 30 days.

How do I fix CVE-2017-0881?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-0881?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST