CVE-2022-31017 json
Expression Always True vulnerability in Zulip Server
published 2022-06-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52718
- cvss
- 2.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- zulip zulip 5.3
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 2.0 | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 2.6 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:N/AC:H/Au:S/C:P/I:N/A:N |
Affected products
- zulip zulip
Classification
References
-
github.com
/zulip/zulip/security/advisories/GHSA-m5j3-jp59-6f3q
third-party-advisory
Sources
- CVE List CVE-2022-31017
- NVD CVE-2022-31017
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