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CVE-2015-3178

13
FAUCET Score

CVE-2015-3178 describes a Cross-site Scripting (XSS) vulnerability in Moodle versions through 2.5.9, 2.6.x before 2.6.11, 2.7.x before 2.7.8, and 2.8.x before 2.8.6, specifically within the external_format_text function. This flaw allows authenticated attackers to inject malicious web script or HTML into external applications via specially crafted strings visible to Moodle web services. The vulnerability has a CVSS score of 3.5, indicating a medium attack complexity, requiring authentication, and primarily impacting integrity (partial) without affecting confidentiality or availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.5.9CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
2.5.0CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.5.0:*:*:*:*:*:*:*
2.5.1CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.5.1:*:*:*:*:*:*:*
2.5.2CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.5.2:*:*:*:*:*:*:*
2.5.3CPE matchmatch criteria
cpe:2.3:a:moodle:moodle:2.5.3:*:*:*:*:*:*:*

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
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 75th 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

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.6.11
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.7.8
composerpatch availablevia ghsa
Product: moodle/moodleFixed in: 2.8.6

Vendor Advisories (1)

composerGHSA-9fmw-m4qx-6cq8low

Moodle cross-site scripting (XSS) vulnerability

May 13, 2022

References

git.moodle.org / gw
openwall.com / lists/oss-security/2015/05/18/1
moodle.org / mod/forum/discuss.php
Vendor Advisory
securityfocus.com / bid/74726
securitytracker.com / id/1032358