How severe is CVE-2022-31358?

CVE-2022-31358 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-31358 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-31358?

CVE-2022-31358 affects Proxmox Virtual Environment. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-31358?

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

When was CVE-2022-31358 published?

CVE-2022-31358 was published on 2022-12-14 and last updated on 2026-07-09.

CVE-2022-31358

CVE-2022-31358 is a critical-severity vulnerability in Proxmox Virtual Environment with a CVSS 3.x base score of 9.0. 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: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Proxmox Virtual Environment
Published: 2022-12-14
Last modified: 2026-07-09

Description

A reflected cross-site scripting (XSS) vulnerability in Proxmox Virtual Environment prior to v7.2-3 allows remote attackers to execute arbitrary web scripts or HTML via non-existent endpoints under path /api2/html/.

Frequently asked questions

What is CVE-2022-31358?: A reflected cross-site scripting (XSS) vulnerability in Proxmox Virtual Environment prior to v7.2-3 allows remote attackers to execute arbitrary web scripts or HTML via non-existent endpoints under path /api2/html/.
How severe is CVE-2022-31358?: CVE-2022-31358 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-31358 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-31358?: CVE-2022-31358 affects Proxmox Virtual Environment. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-31358?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-31358 published?: CVE-2022-31358 was published on 2022-12-14 and last updated on 2026-07-09.

References

Affected products (1)

cpe:2.3:a:proxmox:virtual_environment:*:*:*:*:*:*:*:*

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