How severe is CVE-2016-4803?

CVE-2016-4803 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2016-4803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4803?

CVE-2016-4803 affects Dotcms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-4803?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-4803 published?

CVE-2016-4803 was published on 2016-06-30 and last updated on 2026-06-17.

CVE-2016-4803

CVE-2016-4803 is a high-severity vulnerability in Dotcms with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Dotcms
Published: 2016-06-30
Last modified: 2026-06-17

Description

CRLF injection vulnerability in the send email functionality in dotCMS before 3.3.2 allows remote attackers to inject arbitrary email headers via CRLF sequences in the subject.

Frequently asked questions

What is CVE-2016-4803?: CRLF injection vulnerability in the send email functionality in dotCMS before 3.3.2 allows remote attackers to inject arbitrary email headers via CRLF sequences in the subject.
How severe is CVE-2016-4803?: CVE-2016-4803 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-4803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-4803?: CVE-2016-4803 affects Dotcms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-4803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-4803 published?: CVE-2016-4803 was published on 2016-06-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dotcms:dotcms:*:*:*:*:*:*:*:*

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