CVE-2018-6806

Name: CVE-2018-6806
Creator: NVD / NIST
Published: 2018-02-07T05:29:00.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2018-6806 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Marked 2 through 2.5.11 allows remote attackers to read arbitrary files via a crafted HTML document that triggers a redirect to an x-marked://preview?text= URL. The value of the text parameter can include arbitrary JavaScript code, e.g., making XMLHttpRequest calls.. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

Marked 2 through 2.5.11 allows remote attackers to read arbitrary files via a crafted HTML document that triggers a redirect to an x-marked://preview?text= URL. The value of the text parameter can include arbitrary JavaScript code, e.g., making XMLHttpRequest calls.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS Probability

1.21%

64.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Marked 2 Project	Marked 2	<= 2.5.11

References

http://support.markedapp.com/discussions/questions/9089-reporting-a-vulnerabilityIssue Tracking, Third Party Advisory
http://www.lynxsecurity.io/releases/Local%20File%20Disclosure%20in%20Marked2.pdfExploit, Third Party Advisory
http://support.markedapp.com/discussions/questions/9089-reporting-a-vulnerabilityIssue Tracking, Third Party Advisory
http://www.lynxsecurity.io/releases/Local%20File%20Disclosure%20in%20Marked2.pdfExploit, Third Party Advisory

Timeline

Published: Feb 7, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-6806?

How severe is CVE-2018-6806?

CVE-2018-6806 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2018-6806?

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.

Are you affected by CVE-2018-6806?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST