CVE-2023-23921
Moodle: reflected xss risk in some returnurl parameters
Severity Score
6.1
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
The vulnerability was found Moodle which exists due to insufficient sanitization of user-supplied data in some returnurl parameters. 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. This flaw allows a remote attacker to perform cross-site scripting (XSS) attacks.
*Credits:
Upstream acknowledges DegrangeM as the original reporter.
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2023-01-19 CVE Reserved
- 2023-02-17 CVE Published
- 2024-08-02 CVE Updated
- 2025-03-30 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
References (3)
| URL | Tag | Source |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2162526 | Issue Tracking |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-76810 | 2023-02-28 | |
| https://moodle.org/mod/forum/discuss.php?d=443272#p1782021 | 2023-02-28 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Moodle Search vendor "Moodle" | Moodle Search vendor "Moodle" for product "Moodle" | >= 3.9.0 < 3.9.19 Search vendor "Moodle" for product "Moodle" and version " >= 3.9.0 < 3.9.19" | - |
Affected
| ||||||
| Moodle Search vendor "Moodle" | Moodle Search vendor "Moodle" for product "Moodle" | >= 3.11.0 < 3.11.12 Search vendor "Moodle" for product "Moodle" and version " >= 3.11.0 < 3.11.12" | - |
Affected
| ||||||
| Moodle Search vendor "Moodle" | Moodle Search vendor "Moodle" for product "Moodle" | >= 4.0.0 < 4.0.6 Search vendor "Moodle" for product "Moodle" and version " >= 4.0.0 < 4.0.6" | - |
Affected
| ||||||
| Moodle Search vendor "Moodle" | Moodle Search vendor "Moodle" for product "Moodle" | 4.1.0 Search vendor "Moodle" for product "Moodle" and version "4.1.0" | - |
Affected
| ||||||