CVE-2013-4523
Cross-site scripting (XSS) vulnerability in message/lib.php in Moodle through 2.2.11, 2.3.x...
Cross-site scripting (XSS) vulnerability in message/lib.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 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.
Exploit likelihood
What each source reports
NVD Score used
Cross-site scripting (XSS) vulnerability in message/lib.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 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.
- Record
CVE-2013-4523- CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Cross-site scripting (XSS) vulnerability in message/lib.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 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.
- Record
CVE-2013-4523- Updated
- 2026-11-02
EUVDEUVD-2013-4382 No score
Cross-site scripting (XSS) vulnerability in message/lib.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 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.
- Record
EUVD-2013-4382- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-475h-wv64-r896 No score
Cross-site scripting (XSS) vulnerability in message/lib.php in Moodle through 2.2.11, 2.3.x...
Cross-site scripting (XSS) vulnerability in message/lib.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 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.
- Record
GHSA-475h-wv64-r896- Weakness
- CWE-79
- Updated
- 2026-11-02
OSVMGASA-2013-0356 No score
Updated moodle package fixes security vulnerabilities
Some files were being delivered with incorrect headers in Moodle before 2.4.7, meaning they could be cached downstream (CVE-2013-4522).
Cross-site scripting in Moodle before 2.4.7 due to JavaScript in messages being executed on some pages (CVE-2013-4523).
The file system repository in Moodle before 2.4.7 was allowing access to files beyond the Moodle file area (CVE-2013-4524).
Cross-site scripting in Moodle before 2.4. due to JavaScript in question answers being executed on the Quiz Results page (CVE-2013-4525).
- Record
MGASA-2013-0356- Updated
- 2026-11-02
OSVUBUNTU-CVE-2013-4523 No score
Cross-site scripting (XSS) vulnerability in message/lib.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 allows remote authenticated users to inject arbitrary web script or HTML via a crafted message.
- Record
UBUNTU-CVE-2013-4523- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moodleMageia:3 From an advisory covering 4 CVEs |
before 2.4.7-1.mga3 | 2.4.7-1.mga3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2013-4523 is a low vulnerability (CVSS 3.5) in Moodle, published November 26, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.00%, the 62nd percentile. No source names a fixed version.
References
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-41941
moodle.org/mod/forum/discuss.php?d=244480
openwall.com/lists/oss-security/2013/11/25/1
nvd.nist.gov/vuln/detail/CVE-2013-4523
github.com/advisories/GHSA-475h-wv64-r896
advisories.mageia.org/MGASA-2013-0356.html
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bugs.mageia.org/show_bug.cgi?id=11671
docs.moodle.org/dev/Moodle_2.4.7_release_notes
ubuntu.com/security/CVE-2013-4523
cve.org/CVERecord?id=CVE-2013-4523