CVE-2019-18210Public exploitNetwork attack vector

Stored script execution via unsanitized course descriptions

Published Feb 11, 2020 · Updated Aug 5, 2024

Stored cross-site scripting in Moodle through 3.7.2 allows remote authenticated users with Teacher access to execute JavaScript in other users' browsers. At /course/modedit.php, the introeditor[text] parameter accepts script-bearing course descriptions when an intercepted request bypasses client-side sanitization, and the stored script runs when another user opens the page. Teacher-level access is required, and Moodle disputes the report because it treats Teachers as trusted to add arbitrary JavaScript; the demonstrated consequence is script execution in student or administrator sessions.

CVSS severity5.4
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in Moodle through 3.7.2 allows remote authenticated users with Teacher access to execute JavaScript in other users' browsers. At /course/modedit.php, the introeditor[text] parameter accepts script-bearing course descriptions when an intercepted request bypasses client-side sanitization, and the stored script runs when another user opens the page. Teacher-level access is required, and Moodle disputes the report because it treats Teachers as trusted to add arbitrary JavaScript; the demonstrated consequence is script execution in student or administrator sessions.

The record

CVE
CVE-2019-18210
Published
Feb 11, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5NIST National Vulnerability DatabaseAV:N/AC:M/Au:S/C:N/I:P/A:N
5.4NIST National Vulnerability DatabaseCVSS: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 exploitPublished

Weakness, pattern, technique

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

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo