How severe is CVE-2023-4803?

CVE-2023-4803 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-4803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4803?

CVE-2023-4803 affects Proofpoint Insider Threat Management. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4803?

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

When was CVE-2023-4803 published?

CVE-2023-4803 was published on 2023-09-13 and last updated on 2026-06-17.

CVE-2023-4803

CVE-2023-4803 is a medium-severity vulnerability in Proofpoint Insider Threat Management with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Proofpoint Insider Threat Management
Published: 2023-09-13
Last modified: 2026-06-17

Description

A reflected cross-site scripting vulnerability in the WriteWindowTitle endpoint of the Insider Threat Management (ITM) Server's web console could be used by an authenticated administrator to run arbitrary javascript within another web console administrator's browser. All versions prior to 7.14.3.69 are affected.

Frequently asked questions

What is CVE-2023-4803?: A reflected cross-site scripting vulnerability in the WriteWindowTitle endpoint of the Insider Threat Management (ITM) Server's web console could be used by an authenticated administrator to run arbitrary javascript within another web console administrator's browser. All versions prior to 7.14.3.69 are affected.
How severe is CVE-2023-4803?: CVE-2023-4803 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-4803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4803?: CVE-2023-4803 affects Proofpoint Insider Threat Management. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4803 published?: CVE-2023-4803 was published on 2023-09-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:proofpoint:insider_threat_management:*:*:*:*:*:*:*:*

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