CVE-2022-38146Network attack vector

Reflected XSS via __proto__ prototype pollution

Published Nov 21, 2022 · Updated Apr 30, 2025

Reflected XSS in Silverstripe CMS 4.11 and earlier allows remote attackers to execute script through a crafted URL opened by a CMS user. The CMS UI exposes bundled jQuery 1.7.2 to a proto query-string key; jQuery's deep extend operation copies that key into Object.prototype. Exploitation requires a CMS user to follow the link, after which injected script can read or alter data available in that user's browser session.

CVSS severity5.4
Medium
EPSS probability0.54%
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 Silverstripe CMS 4.11 and earlier allows remote attackers to execute script through a crafted URL opened by a CMS user. The CMS UI exposes bundled jQuery 1.7.2 to a proto query-string key; jQuery's deep extend operation copies that key into Object.prototype. Exploitation requires a CMS user to follow the link, after which injected script can read or alter data available in that user's browser session.

The record

CVE
CVE-2022-38146
Published
Nov 21, 2022
Updated
Apr 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record 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

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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