Vulnerability Name:

CVE-2019-18210 (CCN-176244)

Assigned:2019-10-19
Published:2019-10-19
Updated:2021-12-21
Summary:Persistent XSS in /course/modedit.php of Moodle through 3.7.2 allows authenticated users (Teacher and above) to inject JavaScript into the session of another user (e.g., enrolled student or site administrator) via the introeditor[text] parameter.
Note: the discoverer and vendor disagree on whether Moodle customers have a reasonable expectation that anyone authenticated as a Teacher can be trusted with the ability to add arbitrary JavaScript (this ability is not documented on Moodle's Teacher_role page). Because the vendor has this expectation, they have stated "this report has been closed as a false positive, and not a bug."
CVSS v3 Severity:5.4 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
5.2 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:H/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
5.4 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
5.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:H/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:3.5 Low (CVSS v2 Vector: AV:N/AC:M/Au:S/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.5 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Cross-Site Scripting
References:Source: MITRE
Type: CNA
CVE-2019-18210

Source: MISC
Type: Vendor Advisory
https://docs.moodle.org/38/en/Teacher_role

Source: XF
Type: UNKNOWN
moodle-cve201918210-xss(176244)

Source: CCN
Type: GitHub Web site
Moodle 3.7.2 and Prior Persistent XSS on Unit Pages

Source: MISC
Type: Third Party Advisory
https://gist.github.com/Danbardo/4a6b0fe8cb21ec6d7c54e6ac951bdb0a

Source: CCN
Type: Moodle Web site
Moodle - Open-source learning platform | Moodle.org

Vulnerable Configuration:Configuration 1:
  • cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version <= 3.7.2)

    • Configuration CCN 1:
  • cpe:/a:moodle:moodle:3.7.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:2019182100000000
    V
    		CVE-2019-18210 on Ubuntu 18.04 LTS (bionic) - low.
    2020-02-11
    oval:com.ubuntu.xenial:def:2019182100000000
    V
    		CVE-2019-18210 on Ubuntu 16.04 LTS (xenial) - low.
    2020-02-11
    BACK
    moodle moodle *
    moodle moodle 3.7.2