Vulnerability Details : CVE-2019-3847
Potential exploit
A vulnerability was found in moodle before versions 3.6.3, 3.5.5, 3.4.8 and 3.1.17. Users with the "login as other users" capability (such as administrators/managers) can access other users' Dashboards, but the JavaScript those other users may have added to their Dashboard was not being escaped when being viewed by the user logging in on their behalf.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2019-3847
- cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
- cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
- cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
- cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-3847
0.06%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-3847
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
3.5
|
LOW | AV:N/AC:M/Au:S/C:N/I:P/A:N |
6.8
|
2.9
|
NIST | |
5.4
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
2.8
|
2.5
|
Red Hat, Inc. | |
4.8
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
1.7
|
2.7
|
NIST |
CWE ids for CVE-2019-3847
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2019-3847
-
https://moodle.org/mod/forum/discuss.php?d=384010#p1547742
Moodle.org: MSA-19-0004: "Log in as" functionality exposed to JavaScript risk on other users' DashboardsPatch;Vendor Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3847
1692898 – (CVE-2019-3847) CVE-2019-3847 moodle: "Log in as" functionality exposed to JavaScript risk on other users' DashboardsIssue Tracking;Patch;Third Party Advisory
-
http://www.securityfocus.com/bid/107489
Moodle CVE-2019-3847 Security Bypass VulnerabilityBroken Link;Third Party Advisory;VDB Entry
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