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Fencer Intel
medium 4.0

CVE-2012-3387 json

Moodle Authentication Bypass in File Upload

published 2012-07-23 14 y ago modified 2026-06-16 4 mo ago also GHSA-w66h-c2vj-cm7f , EUVD-2022-5508

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

Moodle 2.3.x before 2.3.1 uses only a client-side check for whether references are permitted in a file upload, which allows remote authenticated users to bypass intended alias (aka shortcut) restrictions via a client that omits this check.

Patch / fix

  • packagist moodle/moodle 2.3.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-3387 updated cvss 4.3

moodle: upstream 2.3.1, 2.2.4, 2.1.7, 2.0.10, 1.9.19 security fixes

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:P/A:N

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
>=2.3, <2.3.1
2.3.1

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
  • CWE-287 Improper Authentication

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.