Vulnerability Name:

CVE-2021-20184 (CCN-195791)

Assigned:2020-12-17
Published:2021-01-25
Updated:2021-02-01
Summary:It was found in Moodle before version 3.10.1, 3.9.4 and 3.8.7 that a insufficient capability checks in some grade related web services meant students were able to view other students grades.
CVSS v3 Severity:4.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
3.8 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-354
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2021-20184

Source: XF
Type: UNKNOWN
moodle-cve202120184-info-disc(195791)

Source: CCN
Type: Moodle Security Advisory MSA-21-0002
Grade information disclosure in grade's external fetch functions

Source: MISC
Type: Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=417167

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-20184

Vulnerable Configuration:Configuration 1:
  • cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version < 3.8.7)
  • OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.9.0 and < 3.9.4)
  • OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.10.0 and < 3.10.1)

  • Configuration CCN 1:
  • cpe:/a:moodle:moodle:3.10:*:*:*:*:*:*:*
  • OR cpe:/a:moodle:moodle:3.9.3:*:*:*:*:*:*:*
  • OR cpe:/a:moodle:moodle:3.8.6:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    moodle moodle *
    moodle moodle *
    moodle moodle *
    moodle moodle 3.10
    moodle moodle 3.9.3
    moodle moodle 3.8.6