CVE-2022-31017
CVE-2022-31017 is a low-severity vulnerability in Zulip with a CVSS 3.x base score of 2.0. 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-571.
Key facts
- Severity: Low (CVSS 3.x base score 2.0)
- CVSS v2: 2.1
- EPSS exploit prediction: 1% (41st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-571
- Affected product: Zulip
- Published:
- Last modified:
Description
Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were subscribed, when edited causes the server to incorrectly send an API event that includes the edited message to all of the stream’s current subscribers. This API event is ignored by official clients, but can be observed by using a modified client or the browser’s developer tools. This bug will be fixed in Zulip Server 5.3. There are no known workarounds.
Frequently asked questions
- What is CVE-2022-31017?
- Zulip is an open-source team collaboration tool. Versions 2.1.0 through and including 5.2 are vulnerable to a logic error. A stream configured as private with protected history, where new subscribers should not be allowed to see messages sent before they were subscribed, when edited causes the server to incorrectly send an API event that includes the edited message to all of the stream’s current subscribers. This API event is ignored by official clients, but can be observed by using a modified client or the browser’s developer tools. This bug will be fixed in Zulip Server 5.3. There are no known workarounds.
- How severe is CVE-2022-31017?
- CVE-2022-31017 has a CVSS 3.x base score of 2.0, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2022-31017 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-31017?
- CVE-2022-31017 affects Zulip. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2022-31017?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2022-31017 published?
- CVE-2022-31017 was published on 2022-06-25 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:*
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