CVE-2021-43791
CVSS V2 Medium 5
CVSS V3 Medium 5.3
Description
Zulip is an open source group chat application that combines real-time chat with threaded conversations. In affected versions expiration dates on the confirmation objects associated with email invitations were not enforced properly in the new account registration flow. A confirmation link takes a user to the check_prereg_key_and_redirect endpoint, before getting redirected to POST to /accounts/register/. The problem was that validation was happening in the check_prereg_key_and_redirect part and not in /accounts/register/ - meaning that one could submit an expired confirmation key and be able to register. The issue is fixed in Zulip 4.8. There are no known workarounds and users are advised to upgrade as soon as possible.
Overview
- CVE ID
- CVE-2021-43791
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-12-02T01:15:07
- Last Modified Date
- 2021-12-03T18:09:06
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* | 1 | OR | 4.8 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f | Third Party Advisory |
| https://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6 | Patch Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-43791 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43791 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:43:10 | Added to TrackCVE | |||
| 2022-12-05 15:24:38 | 2021-12-02T01:15Z | 2021-12-02T01:15:07 | CVE Published Date | updated |
| 2022-12-05 15:24:38 | 2021-12-03T18:09:06 | CVE Modified Date | updated | |
| 2022-12-05 15:24:38 | Analyzed | Vulnerability Status | updated |