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Fencer Intel
medium 5.0

CVE-2013-4522 json

Moodle vulnerable to Exposure of Sensitive Information to an Unauthorized Actor

published 2013-11-26 12 y ago modified 2026-06-16 4 mo ago also GHSA-vm9c-39jx-q45w , EUVD-2013-4381

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

lib/filelib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3 does not send "Cache-Control: private" HTTP headers, which allows remote attackers to obtain sensitive information by requesting a file that had been previously retrieved by a caching proxy server.

Patch / fix

  • packagist moodle/moodle 2.3.10, 2.4.7, 2.5.3

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-2013-4522 updated cvss 4.3

moodle: cache information leak

  • 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

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • git.moodle.org http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-38743 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist moodle/moodle
<2.3.10
>=2.4.0-beta, <2.4.7
>=2.5.0-beta, <2.5.3
2.3.10
2.4.7
2.5.3

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.