CVE-2024-43437: Moodle/moodle Cross-Site Scripting Vulnerability

LOW
Advisory Identifier: GHSA-4hjf-6pxr-549h
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2024-43437 is a LOW (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle cross-site scripting vulnerability. Remediation is available by upgrading affected packages to version 4.4.2, 4.3.6, 4.2.9, 4.1.12.

CVE-2024-43437 at a Glance

CVE Identifier CVE-2024-43437
GHSA Identifier GHSA-4hjf-6pxr-549h
Severity LOW
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Moodle/moodle
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2024-43437

To remediate this vulnerability, upgrade all affected Moodle/moodle dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

moodle/moodle fixed: 4.4.2 
Upgrade moodle/moodle to 4.4.2
moodle/moodle fixed: 4.3.6 
Upgrade moodle/moodle to 4.3.6
moodle/moodle fixed: 4.2.9 
Upgrade moodle/moodle to 4.2.9
moodle/moodle fixed: 4.1.12 
Upgrade moodle/moodle to 4.1.12
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for moodle/moodle

How to Check if You Are Affected

To determine whether your application is affected by CVE-2024-43437, inspect your project dependencies for Moodle/moodle:

inspect dependencies for moodle/moodle

Analyze the terminal output to locate any version of Moodle/moodle in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Moodle/moodle, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A flaw was found in moodle. Insufficient sanitizing of data when performing a restore could result in a cross-site scripting (XSS) risk from malicious backup files.

CVE-2024-43437 Affected Moodle/moodle Versions

4 component(s)
Fixed Versions:
4.4.24.3.64.2.94.1.12
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
≥ 4.4.0
< 4.4.2
4.4.2
moodle/moodle
 Packagist
≥ 4.3.0
< 4.3.6
4.3.6
moodle/moodle
 Packagist
≥ 4.2.0
< 4.2.9
4.2.9
moodle/moodle
 Packagist
< 4.1.12
4.1.12

References

NVD — CVE-2024-43437 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-43437
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2304266
Moodle/moodle Source Repository REPOSITORY
https://github.com/moodle/moodle
moodle.org/mod/forum/discuss.p... WEB
https://moodle.org/mod/forum/discuss.php?d=461207
git.moodle.org/gw WEB
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-81394

Frequently Asked Questions

What is CVE-2024-43437?
CVE-2024-43437 is a security vulnerability in Moodle/moodle involving Moodle Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 4.4.2, 4.3.6, 4.2.9, 4.1.12 across affected packages: moodle/moodle.
What version fixes CVE-2024-43437?
Upgrading to 4.4.2, 4.3.6, 4.2.9, 4.1.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is moodle/moodle affected?
Yes, moodle/moodle is affected in releases prior to 4.4.2, 4.3.6, 4.2.9, 4.1.12. Upgrade your dependency to 4.4.2, 4.3.6, 4.2.9, 4.1.12 or later.
What is the CVSS score of CVE-2024-43437?
CVE-2024-43437 has a CVSS v3.1 base score of 5.4 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2024-43437?
CVE-2024-43437 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Packagist dependencies for CVE-2024-43437?
Run the dependency tree command: 'inspect dependencies for moodle/moodle'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4hjf-6pxr-549h",
  "modified" : "2024-11-12T21:27:49Z",
  "published" : "2024-11-11T15:31:01Z",
  "aliases" : [ "CVE-2024-43437" ],
  "summary" : "Moodle Cross-site Scripting vulnerability",
  "details" : "A flaw was found in moodle. Insufficient sanitizing of data when performing a restore could result in a cross-site scripting (XSS) risk from malicious backup files.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.4.0"
      }, {
        "fixed" : "4.4.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.3.0"
      }, {
        "fixed" : "4.3.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.2.0"
      }, {
        "fixed" : "4.2.9"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.1.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-43437"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2304266"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=461207"
  }, {
    "type" : "WEB",
    "url" : "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-81394"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-11-12T21:27:49Z",
    "nvd_published_at" : "2024-11-11T13:15:04Z"
  }
}