Insufficient Session Expiration in Zulip
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-43791 |
| CWE-ID | CWE-613 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Zulip Server Web applications / Other software |
| Vendor | Zulip |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Insufficient Session Expiration
EUVDB-ID: #VU58481
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-43791
CWE-ID:
CWE-613 - Insufficient Session Expiration
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient session expiration issue. A remote non-authenticated attacker can use expired invitations, self-registrations, or realm creation links.
MitigationInstall updates from vendor's website.
Vulnerable software versionsZulip Server: 4.0 - 4.7
External linkshttp://github.com/zulip/zulip/security/advisories/GHSA-wj76-pcqr-mf9f
http://github.com/zulip/zulip/commit/a014ef75a3a0ed7f24ebb157632ba58751e732c6
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
