How severe is CVE-2018-6806?

CVE-2018-6806 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-6806 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6806?

CVE-2018-6806 affects Marked 2 Project Marked 2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6806?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-6806 published?

CVE-2018-6806 was published on 2018-02-07 and last updated on 2026-06-17.

CVE-2018-6806

CVE-2018-6806 is a medium-severity vulnerability in Marked 2 Project Marked 2 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Marked 2 Project Marked 2
Published: 2018-02-07
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-6806?: 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.
How severe is CVE-2018-6806?: CVE-2018-6806 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-6806 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6806?: CVE-2018-6806 affects Marked 2 Project Marked 2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6806?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-6806 published?: CVE-2018-6806 was published on 2018-02-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:marked_2_project:marked_2:*:*:*:*:*:*:*:*

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