CVE-2014-7831: Moodle/moodle Moodle Exposes Hidden Grades To Vulnerability

MODERATE
Advisory Identifier: GHSA-59j6-8g7w-prf7
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CWE-200
Published
Advisory Summary

CVE-2014-7831 is a MODERATE moodle exposes hidden grades to vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting Moodle/moodle libraries in the Packagist ecosystem. The issue involves moodle exposes hidden grades to students. Remediation is available by upgrading affected packages to version 2.7.3.

CVE-2014-7831 at a Glance

CVE Identifier CVE-2014-7831
GHSA Identifier GHSA-59j6-8g7w-prf7
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product Moodle/moodle
Package Ecosystem Packagist
Published Date
Last Updated

How to Fix CVE-2014-7831

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: 2.7.3 
Upgrade moodle/moodle to 2.7.3
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-2014-7831, 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 2.7.3), 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-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. 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

lib/classes/grades_external.php in Moodle 2.7.x before 2.7.3 does not consider the moodle/grade:viewhidden capability before displaying hidden grades, which allows remote authenticated users to obtain sensitive information by leveraging the student role to access the get_grades web service.

CVE-2014-7831 Affected Moodle/moodle Versions

1 component(s)
Fixed Versions:
2.7.3
Product / Package Ecosystem Affected Versions Fixed Version
moodle/moodle
 Packagist
≥ 2.7.0
< 2.7.3
2.7.3

References

NVD — CVE-2014-7831 NVD
https://nvd.nist.gov/vuln/detail/CVE-2014-7831
Security Fix Commit FIX COMMIT
https://github.com/moodle/moodle/commit/3b8876f5ef2b5cde1e9de2599efd03d02bdaf7d8
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=275153
Moodle/moodle Security Information SECURITY
https://web.archive.org/web/20150914064838/http://www.securitytracker.com/id/1031215
git.moodle.org/gw WEB
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47766
Moodle/moodle Security Information SECURITY
http://openwall.com/lists/oss-security/2014/11/17/11

Frequently Asked Questions

What is CVE-2014-7831?
CVE-2014-7831 is a security vulnerability in Moodle/moodle involving Moodle exposes hidden grades to students under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which Moodle/moodle versions are affected?
Affected versions include releases prior to 2.7.3 across affected packages: moodle/moodle.
What version fixes CVE-2014-7831?
Upgrading to 2.7.3 (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 2.7.3. Upgrade your dependency to 2.7.3 or later.
What CWE is associated with CVE-2014-7831?
CVE-2014-7831 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Packagist dependencies for CVE-2014-7831?
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-59j6-8g7w-prf7",
  "modified" : "2024-01-24T21:27:59Z",
  "published" : "2022-05-13T01:12:41Z",
  "aliases" : [ "CVE-2014-7831" ],
  "summary" : "Moodle exposes hidden grades to students",
  "details" : "lib/classes/grades_external.php in Moodle 2.7.x before 2.7.3 does not consider the moodle/grade:viewhidden capability before displaying hidden grades, which allows remote authenticated users to obtain sensitive information by leveraging the student role to access the get_grades web service.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "moodle/moodle"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.7.0"
      }, {
        "fixed" : "2.7.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2014-7831"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/moodle/moodle/commit/3b8876f5ef2b5cde1e9de2599efd03d02bdaf7d8"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/moodle/moodle"
  }, {
    "type" : "WEB",
    "url" : "https://moodle.org/mod/forum/discuss.php?d=275153"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20150914064838/http://www.securitytracker.com/id/1031215"
  }, {
    "type" : "WEB",
    "url" : "http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47766"
  }, {
    "type" : "WEB",
    "url" : "http://openwall.com/lists/oss-security/2014/11/17/11"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-24T21:27:59Z",
    "nvd_published_at" : "2014-11-24T11:59:00Z"
  }
}