CVE-2023-28336
Moodle: teacher can access names of users they do not have permission to access
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
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
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
CVE-2023-28336- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200, CWE-668
- Updated
- 2026-11-02
CVE List No score
Moodle: teacher can access names of users they do not have permission to access
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
CVE-2023-28336- Weakness
- CWE-200
- Updated
- 2026-11-02
EUVDEUVD-2023-1074 No score
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
EUVD-2023-1074- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-prjm-2fj2-787f
Moodle may allow teachers to access the names of users they could not otherwise access
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
GHSA-prjm-2fj2-787f- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200, CWE-668
- Updated
- 2026-11-02
OSVGHSA-prjm-2fj2-787f
Moodle may allow teachers to access the names of users they could not otherwise access
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
GHSA-prjm-2fj2-787f- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-200, CWE-668
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2023-28336
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
UBUNTU-CVE-2023-28336- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - Updated
- 2026-11-02
OSVBIT-moodle-2023-28336 No score
Moodle: teacher can access names of users they do not have permission to access
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
BIT-moodle-2023-28336- Updated
- 2026-11-02
OSV No score
Moodle: teacher can access names of users they do not have permission to access
Insufficient filtering of grade report history made it possible for teachers to access the names of users they could not otherwise access.
- Record
CVE-2023-28336- Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moodle/moodlePackagist |
4.1.0 up to 4.1.2 | 4.1.2 |
moodle/moodlePackagist |
4.0.0 up to 4.0.7 | 4.0.7 |
moodle/moodlePackagist |
3.11.0 up to 3.11.13 | 3.11.13 |
moodle/moodlePackagist |
before 3.9.20 | 3.9.20 |
moodleBitnami |
3.9.0 up to 3.9.20, 3.11.0 up to 3.11.13, 4.0.0 up to 4.0.7, 4.1.0 up to 4.1.2 | 3.9.203.11.134.0.74.1.2 |
moodle/moodlePackagist |
4.1.0 up to 4.1.2, plus listed versions v4.1.0v4.1.1 |
4.1.2 |
moodle/moodlePackagist |
4.0.0 up to 4.0.7, plus listed versions v4.0.0v4.0.1v4.0.2v4.0.3v4.0.4v4.0.5v4.0.6 |
4.0.7 |
moodle/moodlePackagist |
3.11.0 up to 3.11.13, plus listed versions v3.11.0v3.11.1v3.11.10v3.11.11v3.11.12 Show 8 moreShow lessv3.11.2v3.11.3v3.11.4v3.11.5v3.11.6v3.11.7v3.11.8v3.11.9 |
3.11.13 |
moodle/moodlePackagist |
before 3.9.20, plus listed versions v2.3.10v2.3.11v2.3.4v2.3.5v2.3.6 Show 45 moreShow lessv2.3.7v2.3.8v2.3.9v2.4.0v2.4.0-rc1v2.4.1v2.4.10v2.4.11v2.4.2v2.4.3v2.4.4v2.4.5v2.4.6v2.4.7v2.4.8v2.4.9v2.5.0v2.5.0-betav2.5.0-rc1v2.5.1v2.5.2v2.5.3v2.5.4v2.5.5v2.5.6v2.5.7v2.5.8v2.5.9v2.6.0v2.6.0-betav2.6.0-rc1v2.6.1v2.6.10v2.6.11v2.6.2v2.6.3v2.6.4v2.6.5v2.6.6v2.6.7v2.6.8v2.6.9v2.7.0v2.7.0-betav2.7.0-rc1 |
3.9.20 |
moodleUbuntu: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 |
moodleUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 3.0.3+dfsg-0ubuntu13.0.3+dfsg-0ubuntu1+esm1 |
None known |
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-2023-28336 is a medium vulnerability (CVSS 4.3) in Moodle, published March 23, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.74%, the 55th percentile. Fixed in moodle/moodle 4.1.2.
References
bugzilla.redhat.com/show_bug.cgi?id=2179426
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QZN34VSF4HTCW3C3ZP2OZYSLYUKADPF
moodle.org/mod/forum/discuss.php?d=445068
nvd.nist.gov/vuln/detail/CVE-2023-28336
github.com/moodle/moodle/commit/a931a7f8cec3657827268837b27962a13817ca2b
git.moodle.org/gw?p=moodle.git;a=commit;h=a931a7f8cec3657827268837b27962a13817ca2b
Show 7 moreShow less
ubuntu.com/security/CVE-2023-28336
cve.org/CVERecord?id=CVE-2023-28336
Left out here: 217 versions. The JSON record has them.