CVE-2015-5264
Moodle allows attackers to enter additional answer attempts
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
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
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
5.4
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
- Record
CVE-2015-5264- CVSS 3.0
- 5.4 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - CVSS 2.0
- 5.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:N - Weakness
- CWE-264
- Updated
- 2026-11-02
CVE List No score
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
- Record
CVE-2015-5264- Updated
- 2026-11-02
EUVDEUVD-2022-4589 No score
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
- Record
EUVD-2022-4589- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mm9q-3847-m48x
5.4
Moodle allows attackers to enter additional answer attempts
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
- Record
GHSA-mm9q-3847-m48x- CVSS 3.0
- 5.4 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVGHSA-mm9q-3847-m48x
5.4
Moodle allows attackers to enter additional answer attempts
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
- Record
GHSA-mm9q-3847-m48x- CVSS 3.0
- 5.4 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2015-5264
5.4
The lesson module in Moodle through 2.6.11, 2.7.x before 2.7.10, 2.8.x before 2.8.8, and 2.9.x before 2.9.2 allows remote authenticated users to bypass intended access restrictions and enter additional answer attempts by leveraging the student role.
- Record
UBUNTU-CVE-2015-5264- CVSS 3.0
- 5.4 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
OSVMGASA-2015-0381 No score
Updated moodle packages fix security vulnerabilities
Updated moodle package fixes security vulnerabilities:
In Moodle before 2.8.8, completed and graded lesson activity was not protected against making new attempts to answer some questions, so students could re-attempt answering questions in the lesson (CVE-2015-5264).
In Moodle before 2.8.8, users could delete files uploaded by other users in wiki (CVE-2015-5265).
In Moodle before 2.8.8, meta course synchronisation enrols suspended students as managers for a short period of time and causes large database growth. On large installations, when the sync script takes a long time, suspended students may get assigned a manager role in meta course for several minutes (CVE-2015-5266)
In Moodle before 2.8.8, password recovery tokens can be guessed because of php randomisation limitations (CVE-2015-5267).
In Moodle before 2.8.8, when viewing ratings, the group access was not properly checked, allowing users from other groups to view ratings (CVE-2015-5268).
In Moodle before 2.8.8, capability to manage groups does not have XSS risk, however it was possible to add XSS to the grouping description (CVE-2015-5269).
The moodle package has been updated to version 2.8.8, fixing these issues and several other bugs.
Additionally, the preg plugin has been updated to version 2.8, and the OU Multiple Response question type and UIkit theme have been added to the package.
- Record
MGASA-2015-0381- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moodle/moodlePackagist |
2.7.0 up to 2.7.10 | 2.7.10 |
moodle/moodlePackagist |
2.8.0 up to 2.8.8 | 2.8.8 |
moodle/moodlePackagist |
2.9.0 up to 2.9.2 | 2.9.2 |
moodle/moodlePackagist |
2.7.0 up to 2.7.10, plus listed versions v2.7.0v2.7.1v2.7.2v2.7.3v2.7.4 Show 5 moreShow lessv2.7.5v2.7.6v2.7.7v2.7.8v2.7.9 |
2.7.10 |
moodle/moodlePackagist |
2.8.0 up to 2.8.8, plus listed versions v2.8.0v2.8.1v2.8.2v2.8.3v2.8.4v2.8.5v2.8.6v2.8.7 |
2.8.8 |
moodle/moodlePackagist |
2.9.0 up to 2.9.2, plus listed versions v2.9.0v2.9.1 |
2.9.2 |
moodleMageia:5 From an advisory covering 6 CVEs |
before 2.8.8-1.mga5 | 2.8.8-1.mga5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| 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-2015-5264 is a medium vulnerability (CVSS 5.4) in Moodle, published September 23, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.40%, the 72nd percentile. Fixed in moodle/moodle 2.7.10.
References
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50516
openwall.com/lists/oss-security/2015/09/21/1
securitytracker.com/id/1033619
moodle.org/mod/forum/discuss.php?d=320287
nvd.nist.gov/vuln/detail/CVE-2015-5264
github.com/moodle/moodle/commit/3071f085918dfeabb154596362dab2648ec6ad84
Show 26 moreShow less
github.com/moodle/moodle/commit/343ed5b929ff8a68efe076505cd3e52d951f7869
github.com/moodle/moodle/commit/39b50f7d3eea43266a3d0c09590e48624e69a091
github.com/moodle/moodle/commit/67e3f70bb11382fc0f1eaf1a160c349269e370cc
github.com/moodle/moodle/commit/9d5b339126586eddeced463c81295146e231a3c4
github.com/moodle/moodle/commit/9fd13426926fd882d3f024cb7171802ef2b3814d
github.com/moodle/moodle/commit/ca74203efd51be6467091d9af762a31a7cad5840
github.com/moodle/moodle/commit/cd3a6a78b67abf5c9eb355ddc7899b1b2a9b20ac
github.com/moodle/moodle/commit/e7288eaabe77e04157f702b20fd0a7e9ce7067ca
github.com/moodle/moodle/commit/f9cc721dfd761ee34209cf58838079b9b550b356
web.archive.org/web/20160323063809/http://www.securitytracker.com/id/1033619
github.com/advisories/GHSA-mm9q-3847-m48x
github.com/moodle/moodle
advisories.mageia.org/MGASA-2015-0381.html
bugs.mageia.org/show_bug.cgi?id=16767
moodle.org/mod/forum/discuss.php?d=320289
moodle.org/mod/forum/discuss.php?d=320290
moodle.org/mod/forum/discuss.php?d=320291
moodle.org/mod/forum/discuss.php?d=320292
moodle.org/mod/forum/discuss.php?d=320293
docs.moodle.org/dev/Moodle_2.8.8_release_notes
moodle.org/mod/forum/discuss.php?d=319884
bitbucket.org/oasychev/moodle-plugins
moodle.org/plugins/view/qtype_oumultiresponse
moodle.org/plugins/view/theme_uikit
ubuntu.com/security/CVE-2015-5264
cve.org/CVERecord?id=CVE-2015-5264