How severe is CVE-2017-0896?

CVE-2017-0896 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-0896 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-0896?

CVE-2017-0896 primarily affects Zulip Zulip Server. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-0896?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-0896 published?

CVE-2017-0896 was published on 2017-06-02 and last updated on 2026-06-17.

CVE-2017-0896

CVE-2017-0896 is a medium-severity vulnerability in Zulip Zulip Server with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Zulip Zulip Server
Published: 2017-06-02
Last modified: 2026-06-17

Description

Zulip Server 1.5.1 and below suffer from an error in the implementation of the invite_by_admins_only setting in the Zulip group chat application server that allowed an authenticated user to invite other users to join a Zulip organization even if the organization was configured to prevent this.

Frequently asked questions

What is CVE-2017-0896?: Zulip Server 1.5.1 and below suffer from an error in the implementation of the invite_by_admins_only setting in the Zulip group chat application server that allowed an authenticated user to invite other users to join a Zulip organization even if the organization was configured to prevent this.
How severe is CVE-2017-0896?: CVE-2017-0896 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-0896 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-0896?: CVE-2017-0896 primarily affects Zulip Zulip Server. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-0896?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-0896 published?: CVE-2017-0896 was published on 2017-06-02 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:a:zulip:zulip_server:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.1:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.2:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.3:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.4:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.6:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.7:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.8:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.9:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.10:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.11:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.12:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.3.13:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:zulip:zulip_server:1.5.1:*:*:*:*:*:*:*

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