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CVE-2018-14631

Moodle Cross-site Scripting

8.8 HighFix available

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

2.08%Up 1.0 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 8.8

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
CVE-2018-14631
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-20
Updated
2026-11-02
EUVDEUVD-2022-3997 8.8

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
EUVD-2022-3997
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-gqrp-qhv8-phrv 6.1

Moodle Cross-site Scripting

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
GHSA-gqrp-qhv8-phrv
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
NVD 8.8

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
CVE-2018-14631
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-20, CWE-79
Updated
2026-11-02
OSV 6.1

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
CVE-2018-14631
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVGHSA-gqrp-qhv8-phrv 6.1

Moodle Cross-site Scripting

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
GHSA-gqrp-qhv8-phrv
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVUBUNTU-CVE-2018-14631 8.8

moodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumb navigation provided by Boost theme when displaying search results of a blog were insufficiently filtered, which could result in reflected XSS if a user followed a malicious link containing JavaScript in the search parameter.

Record
UBUNTU-CVE-2018-14631
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.0
6.1 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
moodle/moodle
Packagist
 3.3 up to 3.3.8
3.3.8
moodle/moodle
Packagist
 3.4 up to 3.4.5
3.4.5
moodle/moodle
Packagist
 3.5 up to 3.5.2
3.5.2
moodle/moodle
Packagist
 3.3 up to 3.3.8, plus listed versions
v3.3.0v3.3.0-betav3.3.0-rc1v3.3.0-rc2v3.3.0-rc3
Show 7 moreShow less
v3.3.1v3.3.2v3.3.3v3.3.4v3.3.5v3.3.6v3.3.7
3.3.8
moodle/moodle
Packagist
 3.4 up to 3.4.5, plus listed versions
v3.4.0v3.4.0-betav3.4.0-rc1v3.4.0-rc2v3.4.0-rc3
Show 4 moreShow less
v3.4.1v3.4.2v3.4.3v3.4.4
3.4.5
moodle/moodle
Packagist
 3.5 up to 3.5.2, plus listed versions
v3.5.0v3.5.0-betav3.5.0-rc1v3.5.1
3.5.2
moodle
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
2.7.9+dfsg-12.7.10+dfsg-12.7.11+dfsg-12.7.11+dfsg-22.7.12+dfsg-13.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1
 None known
moodle
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
3.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1
 None known

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-14631 is a high vulnerability (CVSS 8.8) in [unknown] Moodle, published September 17, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.08%, the 81st percentile. Fixed in moodle/moodle 3.3.8.

References

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