CVE-2019-3851
Moodle Secure layout contained an insecure link in Boost theme
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
- Record
CVE-2019-3851- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
EUVDEUVD-2022-4781
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
- Record
EUVD-2022-4781- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-pj45-hp8h-289r
Moodle Secure layout contained an insecure link in Boost theme
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
- Record
GHSA-pj45-hp8h-289r- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
NVD
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
- Record
CVE-2019-3851- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:P/A:N - Updated
- 2026-11-02
OSV
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
- Record
CVE-2019-3851- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-pj45-hp8h-289r
Moodle Secure layout contained an insecure link in Boost theme
A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.
- Record
GHSA-pj45-hp8h-289r- CVSS 3.0
- 4.3 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moodle/moodlePackagist |
3.5 up to 3.5.5 | 3.5.5 |
moodle/moodlePackagist |
3.6 up to 3.6.3 | 3.6.3 |
moodle/moodlePackagist |
3.5 up to 3.5.5, plus listed versions v3.5.0v3.5.0-betav3.5.0-rc1v3.5.1v3.5.2v3.5.3v3.5.4 |
3.5.5 |
moodle/moodlePackagist |
3.6 up to 3.6.3, plus listed versions v3.6.0v3.6.0-betav3.6.0-rc1v3.6.0-rc2v3.6.0-rc3v3.6.1v3.6.2 |
3.6.3 |
History
| Recorded | Changed | Sources |
|---|---|---|
| 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-2019-3851 is a medium vulnerability (CVSS 4.3) in [unknown] Moodle, published March 26, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.88%, the 59th percentile. Fixed in moodle/moodle 3.5.5.
References
bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3851
moodle.org/mod/forum/discuss.php?d=384014
nvd.nist.gov/vuln/detail/CVE-2019-3851
github.com/moodle/moodle/commit/7f22b14efb3408645cede026ad11126f17e3f59a