Vulnerability in Zulip Zulip_server
CVE-2019-16215
The Markdown parser in Zulip server before 2.0.5 used a regular expression vulnerable to exponential backtracking. A user who is logged into the server could send a crafted message causing the server to spend an effectively arbitrary amoun…
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.012 (66.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Zulip Zulip_server
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-16215?
- CVE-2019-16215 is a medium-severity vulnerability in Zulip Zulip_server, classified under Inefficient Regular Expression Complexity. CVSS score: 6.5/10. Published 2019-09-18.
- How severe is CVE-2019-16215?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2019-16215 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.