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CVE-2013-4525

13
FAUCET Score

CVE-2013-4525 describes a cross-site scripting (XSS) vulnerability in Moodle versions 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. This vulnerability allows authenticated users to inject arbitrary web script or HTML via answers to text-based quiz questions. The severity is rated as medium (CVSS 3.5), requiring user authentication and moderate attack complexity, with a potential impact of partial integrity compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.11CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
1.1.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.1.1:*:*:*:*:*:*:*
1.2.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.2.0:*:*:*:*:*:*:*
1.2.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.2.1:*:*:*:*:*:*:*
1.3.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:1.3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

3.5LOW

AV:N/AC:M/Au:S/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 49th percentile among its peer group of 1,638 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

git.moodle.org / gw
ExploitPatch
openwall.com / lists/oss-security/2013/11/25/1
moodle.org / mod/forum/discuss.php
Vendor Advisory