CVE-2017-18871
HIGHCVSS 7.5/10EPSS 1.11%
Last modified
CVE-2017-18871 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.. EPSS estimates a 1.11% chance of exploitation in the next 30 days.
Description
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Mattermost | Mattermost Server | < 4.2.2 | — |
| Mattermost | Mattermost Server | >= 4.3.0, < 4.3.4 | — |
| Mattermost | Mattermost Server | >= 4.4.0, < 4.4.5 | — |
| Mattermost | Mattermost Server | 4.5.0 | Rc1 |
References
- https://mattermost.com/security-updates/Vendor Advisory
- https://mattermost.com/security-updates/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2017-18871?
An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.
How severe is CVE-2017-18871?
CVE-2017-18871 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.11% probability of exploitation in the next 30 days.
How do I fix CVE-2017-18871?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2017
- CVE-2017-18866Certain NETGEAR devices are affected by stored XSS. This aff…6.1
- CVE-2017-18867Certain NETGEAR devices are affected by incorrect configurat…6.8
- CVE-2017-18868Digi XBee 2 devices do not have an effective protection mech…7.7
- CVE-2017-18869A TOCTOU issue in the chownr package before 1.1.0 for Node.j…2.5
- CVE-2017-1887Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultI…
- CVE-2017-18870An issue was discovered in Mattermost Server before 4.5.0, 4…4.3
- CVE-2017-18872An issue was discovered in Mattermost Server before 4.4.3 an…4.3
- CVE-2017-18873An issue was discovered in Mattermost Server before 4.3.0, 4…5.3
- CVE-2017-18874An issue was discovered in Mattermost Server before 4.3.0, 4…6.5
- CVE-2017-18875An issue was discovered in Mattermost Server before 4.3.0, 4…4.9
- CVE-2017-18876An issue was discovered in Mattermost Server before 4.3.0, 4…4.9
- CVE-2017-18877An issue was discovered in Mattermost Server before 4.3.0, 4…6.1
Are you affected by CVE-2017-18871?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST