CVE-2022-31358Public exploitNetwork attack vector

Host command execution via unescaped breadcrumb href

Published Dec 14, 2022 · Updated Jul 9, 2026

Reflected XSS in Proxmox Virtual Environment before 7.2-3 allows remote attackers to execute web scripts through crafted API paths. The API inspector concatenates a non-existent /api2/html/ request path into a breadcrumb link's href attribute without HTML encoding. Exploitation requires an authenticated administrator to follow a malicious link in the same browser session, enabling actions available through the web interface, including host command execution.

CVSS severity9.0
Critical
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Proxmox Virtual Environment before 7.2-3 allows remote attackers to execute web scripts through crafted API paths. The API inspector concatenates a non-existent /api2/html/ request path into a breadcrumb link's href attribute without HTML encoding. Exploitation requires an authenticated administrator to follow a malicious link in the same browser session, enabling actions available through the web interface, including host command execution.

The record

CVE
CVE-2022-31358
Published
Dec 14, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.0NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
9.0CISACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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