CVE-2022-45151Network attack vector

Stored XSS via insufficient social-field escaping

Published Nov 23, 2022 · Updated Apr 25, 2025

Stored XSS in Moodle LMS 3.11.0 through 3.11.10 and 4.0.0 through 4.0.4 allows remote authenticated users to run script in other users' browsers. The social user profile field type fails to escape attacker-controlled field values before rendering them into profile pages. Exploitation requires an authenticated account that can edit those fields and a victim who views the stored profile, placing page data and actions available to that victim in the script's reach.

CVSS severity5.4
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Moodle LMS 3.11.0 through 3.11.10 and 4.0.0 through 4.0.4 allows remote authenticated users to run script in other users' browsers. The social user profile field type fails to escape attacker-controlled field values before rendering them into profile pages. Exploitation requires an authenticated account that can edit those fields and a victim who views the stored profile, placing page data and actions available to that victim in the script's reach.

The record

CVE
CVE-2022-45151
Published
Nov 23, 2022
Updated
Apr 25, 2025
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 23, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Fixed in moodle 4.0.5, moodle 3.11.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Moodle · Moodle LMSversion=Fixed in moodle 4.0.5, moodle 3.11.11

Published CVSS scores

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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