CVE-2022-35653Network attack vector

Reflected script execution via unsanitized LTI input

Published Jul 25, 2022 · Updated Aug 3, 2024

Reflected XSS in Moodle LMS's LTI module 3.9 through 3.9.14, 3.11 through 3.11.7, and 4.0 through 4.0.1 allows remote attackers to run script. The LTI module places insufficiently sanitized user-supplied request data into a rendered page, enabling arbitrary HTML and JavaScript execution. A visitor must be unauthenticated and follow a crafted link; authenticated users are not affected, and the script can expose browser-accessible data or alter displayed content.

CVSS severity6.1
Medium
EPSS probability4.46%
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 Moodle LMS's LTI module 3.9 through 3.9.14, 3.11 through 3.11.7, and 4.0 through 4.0.1 allows remote attackers to run script. The LTI module places insufficiently sanitized user-supplied request data into a rendered page, enabling arbitrary HTML and JavaScript execution. A visitor must be unauthenticated and follow a crafted link; authenticated users are not affected, and the script can expose browser-accessible data or alter displayed content.

The record

CVE
CVE-2022-35653
Published
Jul 25, 2022
Updated
Aug 3, 2024
Vendor
Moodle
Product
Moodle LMS
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 4.0.2, moodle 3.11.8, moodle 3.9.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Moodle · Moodle LMSversion=Fixed in moodle 4.0.2, moodle 3.11.8, moodle 3.9.15

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1204.001User Execution: Malicious Link

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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