MEDIUM
Moodle 2.9.x before 2.9.3 does not properly check the contact list before authorizing message transmission, which allows remote authenticated users to bypass intended access restrictions and conduct spam attacks via the messaging API
Published Feb 22, 2016
4.3
MEDIUMCVSS 3.0
EPSS 1.28%
Description
Moodle 2.9.x before 2.9.3 does not properly check the contact list before authorizing message transmission, which allows remote authenticated users to bypass intended access restrictions and conduct spam attacks via the messaging API.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
4.3 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
4.0 MEDIUM NVD
AV:N/AC:L/Au:S/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.28% 0.01278
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01278
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.28% (0.01278) | 68.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.28% (0.01278) | 66.10th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.16% (0.00163) | 34.77th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.08% (0.00081) | 36.59th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.08% (0.00081) | 35.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00081) | 33.02th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
Weaknesses (1)
References (5)
- http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50426 x_refsource_CONFIRM
- https://github.com/advisories/GHSA-m7cc-6vhg-39wr Advisory
- https://github.com/moodle/moodle/commit/cd0c9ac87d75b3d893d61df21e3ecfd12c065c1f
- https://moodle.org/mod/forum/discuss.php?d=323228 x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-5331
| Link | Providers | Tags |
|---|---|---|
| http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50426 | x_refsource_CONFIRM | |
| https://github.com/advisories/GHSA-m7cc-6vhg-39wr | Advisory | |
| https://github.com/moodle/moodle/commit/cd0c9ac87d75b3d893d61df21e3ecfd12c065c1f | ||
| https://moodle.org/mod/forum/discuss.php?d=323228 | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-5331 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Feb 22, 2016
Updated Aug 6, 2024
Reserved Jul 1, 2015
Link CVE-2015-5331
CISA Vulnrichment
GHSA-M7CC-6VHG-39WR Updated n/a