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Vulnerability details: VCID-uct5-whjj-ykdj
Vulnerability ID VCID-uct5-whjj-ykdj
Aliases CVE-2018-1133
GHSA-xh2j-q4mc-v522
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.6286 https://api.first.org/data/v1/epss?cve=CVE-2018-1133
epss 0.6286 https://api.first.org/data/v1/epss?cve=CVE-2018-1133
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-xh2j-q4mc-v522
cvssv3.1 8.8 https://github.com/moodle/moodle
generic_textual HIGH https://github.com/moodle/moodle
cvssv3.1 8.8 https://moodle.org/mod/forum/discuss.php?d=371199
generic_textual HIGH https://moodle.org/mod/forum/discuss.php?d=371199
cvssv2 6.5 https://nvd.nist.gov/vuln/detail/CVE-2018-1133
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-1133
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-1133
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2018-1133
cvssv3.1 8.8 https://www.exploit-db.com/exploits/46551
generic_textual HIGH https://www.exploit-db.com/exploits/46551
cvssv3.1 8.8 http://www.securityfocus.com/bid/104307
generic_textual HIGH http://www.securityfocus.com/bid/104307
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-1133
https://github.com/moodle/moodle
https://moodle.org/mod/forum/discuss.php?d=371199
https://nvd.nist.gov/vuln/detail/CVE-2018-1133
https://www.exploit-db.com/exploits/46551
https://www.exploit-db.com/exploits/46551/
http://www.securityfocus.com/bid/104307
cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
GHSA-xh2j-q4mc-v522 https://github.com/advisories/GHSA-xh2j-q4mc-v522
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/moodle/moodle
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://moodle.org/mod/forum/discuss.php?d=371199
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1133
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1133
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1133
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://www.exploit-db.com/exploits/46551
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at http://www.securityfocus.com/bid/104307
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.98257
EPSS Score 0.6286
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:28:00.307050+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-xh2j-q4mc-v522/GHSA-xh2j-q4mc-v522.json 36.1.3