CVE-2018-1133
Moodle calculated question type allows remote code execution by Question authors
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
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
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
CVE-2018-1133- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.5 Medium
AV:N/AC:L/Au:S/C:P/I:P/A:P - Weakness
- CWE-94
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
CVE-2018-1133- Updated
- 2026-11-02
EUVDEUVD-2022-5790 No score
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
EUVD-2022-5790- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xh2j-q4mc-v522
Moodle calculated question type allows remote code execution by Question authors
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
GHSA-xh2j-q4mc-v522- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
OSV
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
CVE-2018-1133- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-xh2j-q4mc-v522
Moodle calculated question type allows remote code execution by Question authors
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
GHSA-xh2j-q4mc-v522- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2018-1133
An issue was discovered in Moodle 3.x. A Teacher creating a Calculated question can intentionally cause remote code execution on the server, aka eval injection.
- Record
UBUNTU-CVE-2018-1133- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
moodle/moodlePackagist |
3.1 up to 3.1.12 | 3.1.12 |
moodle/moodlePackagist |
3.2 up to 3.2.9 | 3.2.9 |
moodle/moodlePackagist |
3.3 up to 3.3.6 | 3.3.6 |
moodle/moodlePackagist |
3.4 up to 3.4.3 | 3.4.3 |
moodle/moodlePackagist |
3.1 up to 3.1.12, plus listed versions v3.1.0v3.1.0-betav3.1.0-rc1v3.1.0-rc2v3.1.1 Show 10 moreShow lessv3.1.10v3.1.11v3.1.2v3.1.3v3.1.4v3.1.5v3.1.6v3.1.7v3.1.8v3.1.9 |
3.1.12 |
moodle/moodlePackagist |
3.2 up to 3.2.9, plus listed versions v3.2.0v3.2.0-betav3.2.0-rc1v3.2.0-rc2v3.2.0-rc3 Show 10 moreShow lessv3.2.0-rc4v3.2.0-rc5v3.2.1v3.2.2v3.2.3v3.2.4v3.2.5v3.2.6v3.2.7v3.2.8 |
3.2.9 |
moodle/moodlePackagist |
3.3 up to 3.3.6, plus listed versions v3.3.0v3.3.0-betav3.3.0-rc1v3.3.0-rc2v3.3.0-rc3 Show 5 moreShow lessv3.3.1v3.3.2v3.3.3v3.3.4v3.3.5 |
3.3.6 |
moodle/moodlePackagist |
3.4 up to 3.4.3, plus listed versions v3.4.0v3.4.0-betav3.4.0-rc1v3.4.0-rc2v3.4.0-rc3v3.4.1v3.4.2 |
3.4.3 |
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 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Moodle 3.4.1 - Remote Code Execution | 2019-03-15 |
| PoC in GitHub | Feidao-fei/MOODLE-3.X-Remote-Code-Execution | 2020-12-26 |
| PoC in GitHub | That-Guy-Steve/CVE-2018-1133-Exploit | 2023-12-20 |
| PoC in GitHub | darrynten/MoodleExploit | 2019-03-15 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-1133 is a high vulnerability (CVSS 8.8) in Moodle, published May 25, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 30.8%, the 98th percentile. Fixed in moodle/moodle 3.1.12.