PatchTheCVECVE-2018-6806: Marked 2 through 2.5.11 allows remote attackers to read arbitrary files via a crafted HTML document that trigg
CVE-2018-6806 is a medium-severity flaw (CVSS 6.5) affecting marked 2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 1.2% (top 32%) |
| CISA exploited list | No |
| Weakness | CWE-200 |
| Published | 2018-02-07 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-6806?
marked 2: upgrade to newer than 2.5.11. Exact commands for each OS are on this page.
Is CVE-2018-6806 being exploited?
CVE-2018-6806 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-6806 affect?
CVE-2018-6806 affects marked 2. Severity is medium (CVSS 6.5). 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., ma
How urgent is CVE-2018-6806?
Priority 45/100. Public exploit reference