CVE-2020-13869: Comments plugin stored Cross-site Scripting via a guest name
5.4
CVSS Score
3.1
Basic Information
CVE ID
GHSA ID
EPSS Score
0.43188%
CWE
Published
5/24/2022
Updated
4/24/2024
KEV Status
No
Technology
PHP
Technical Details
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| verbb/comments | composer | < 1.5.5 | 1.5.5 |
Vulnerability Intelligence
Miggo AI
Root Cause Analysis
The vulnerability stems from improper neutralization of guest name input (CWE-79). The changelog explicitly mentions fixing XSS in guest names in v1.5.5, indicating pre-patch versions lacked sanitization at both input handling and output rendering stages. Craft CMS plugins typically process user input in service classes and render via Twig templates, making these the most likely vulnerable points. The high confidence comes from the advisory's specific mention of guest name as the attack vector and standard XSS prevention patterns in web applications.