CVE-2022-35653

A reflected XSS issue was identified in the LTI module of Moodle. The vulnerability exists due to insufficient sanitization of user-supplied data in the LTI module. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website to steal potentially sensitive information, change appearance of the web page, can perform phishing and drive-by-download attacks. This vulnerability does not impact authenticated users.

Published: 2022-07-25 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-35653 is rated Moderate Risk (50.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.67%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-35653

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 83.65% 3.67% -79.97%
2 2026-05-16 81.09% 83.65% +2.55%
3 2026-03-20 — 81.09% —

Full EPSS history (55 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-35653

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.7 [email protected]

Weakness enumeration for CVE-2022-35653

GitHub Security Advisory for CVE-2022-35653

GHSA-62wh-m4jr-233r · Severity: medium · Ecosystem: composer — Moodle LTI module reflected XSS risk

OS Trackers for CVE-2022-35653

vendor priority summary link
ubuntu medium CVE-2022-35653 medium priority: Ubuntu including 1 source packages (moodle), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 9, needs-triage 3, ignored 1. https://ubuntu.com/security/CVE-2022-35653

Affected software / configurations for CVE-2022-35653

Vendor Product Version Raw CPE
moodle moodle >= 3.9.0, < 3.9.15 cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle >= 3.11.0, < 3.11.8 cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*
moodle moodle 4.0.0 cpe:2.3:a:moodle:moodle:4.0.0:-:*:*:*:*:*:*
moodle moodle 4.0.0 cpe:2.3:a:moodle:moodle:4.0.0:beta:*:*:*:*:*:*
moodle moodle 4.0.0 cpe:2.3:a:moodle:moodle:4.0.0:rc1:*:*:*:*:*:*
moodle moodle 4.0.0 cpe:2.3:a:moodle:moodle:4.0.0:rc2:*:*:*:*:*:*
moodle moodle 4.0.0 cpe:2.3:a:moodle:moodle:4.0.0:rc3:*:*:*:*:*:*
moodle moodle 4.0.0 cpe:2.3:a:moodle:moodle:4.0.0:rc4:*:*:*:*:*:*
moodle moodle 4.0.1 cpe:2.3:a:moodle:moodle:4.0.1:*:*:*:*:*:*:*
fedoraproject fedora 35 cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
fedoraproject fedora 36 cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
redhat enterprise_linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*

References for CVE-2022-35653

cvelogic Threat Intelligence