How severe is CVE-2023-5771?

CVE-2023-5771 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-5771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5771?

CVE-2023-5771 primarily affects Proofpoint Enterprise Protection. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-5771?

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

When was CVE-2023-5771 published?

CVE-2023-5771 was published on 2023-11-06 and last updated on 2026-06-17.

CVE-2023-5771

CVE-2023-5771 is a medium-severity vulnerability in Proofpoint Enterprise Protection with a CVSS 3.x base score of 6.1. 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 6.1)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Proofpoint Enterprise Protection
Published: 2023-11-06
Last modified: 2026-06-17

Description

Proofpoint Enterprise Protection contains a stored XSS vulnerability in the AdminUI. An unauthenticated attacker can send a specially crafted email with HTML in the subject which triggers XSS when viewing quarantined messages. This issue affects Proofpoint Enterprise Protection: from 8.20.0 before patch 4796, from 8.18.6 before patch 4795 and all other prior versions.

Frequently asked questions

What is CVE-2023-5771?: Proofpoint Enterprise Protection contains a stored XSS vulnerability in the AdminUI. An unauthenticated attacker can send a specially crafted email with HTML in the subject which triggers XSS when viewing quarantined messages. This issue affects Proofpoint Enterprise Protection: from 8.20.0 before patch 4796, from 8.18.6 before patch 4795 and all other prior versions.
How severe is CVE-2023-5771?: CVE-2023-5771 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-5771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5771?: CVE-2023-5771 primarily affects Proofpoint Enterprise Protection. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-5771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-5771 published?: CVE-2023-5771 was published on 2023-11-06 and last updated on 2026-06-17.

References

https://www.proofpoint.com/us/security/security-advisories/pfpt-sa-2023-0010

Affected products (3)

cpe:2.3:a:proofpoint:enterprise_protection:*:*:*:*:*:*:*:*
cpe:2.3:a:proofpoint:enterprise_protection:8.18.6:-:*:*:*:*:*:*
cpe:2.3:a:proofpoint:enterprise_protection:8.20.0:-:*:*:*:*:*:*

More vulnerabilities in Proofpoint Enterprise Protection

CVE-2023-0090 — Critical (CVSS 9.8): The webservices in Proofpoint Enterprise Protection (PPS/POD) contain a vulnerability that allows for an anonymous user…
CVE-2022-46332 — Critical (CVSS 9.6): The Admin Smart Search feature in Proofpoint Enterprise Protection (PPS/PoD) contains a stored cross-site scripting…
CVE-2023-0089 — High (CVSS 8.8): The webutils in Proofpoint Enterprise Protection (PPS/POD) contain a vulnerability that allows an authenticated user to…
CVE-2019-19680 — High (CVSS 8.8): A file-extension filtering vulnerability in Proofpoint Enterprise Protection (PPS / PoD), in the unpatched versions of…
CVE-2022-46334 — High (CVSS 7.8): Proofpoint Enterprise Protection (PPS/PoD) contains a vulnerability which allows the pps user to escalate to root…
CVE-2021-39304 — High (CVSS 7.5): Proofpoint Enterprise Protection before 8.12.0-2108090000 allows security control bypass.

All CVEs affecting Proofpoint Enterprise Protection →

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