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WordPress Plugin Vulnerabilities

FluentSMTP < 2.2.3 - Stored XSS via Email Logs

Description

The plugin does not sanitize or escape email content, making it vulnerable to stored cross-site scripting attacks (XSS) when an administrator views the email logs. This exploit requires other plugins to enable users to send emails with unfiltered HTML.

Proof of Concept

XSS Payload : <img src=x onerror=alert('xss') >

Steps to reproduce:
1. Install subscribe2 plugin (https://wordpress.org/plugins/subscribe2/)
2. Install FluentSMTP
3. Configure FluentSMTP to use custom SMTP (for testing use mailtrap).
4. As another user (needs Author+ role), send an email using subscribe2 plugin with email content as xss payload.
5. View logs and click on preview icon to trigger XSS.
 

Affects Plugins

fluent-smtp
Fixed in version 2.2.3

References

CVE
CVE-2023-0219

Classification

Type

XSS

OWASP top 10
A7: Cross-Site Scripting (XSS)
CWE
CWE-79

Miscellaneous

Original Researcher

Vaibhav Rajput

Submitter

Vaibhav Rajput

Verified

Yes

WPVDB ID
71662b72-311c-42db-86c5-a0276d25535c

Timeline

Publicly Published

2023-02-20 (about 3 months ago)

Added

2023-02-20 (about 3 months ago)

Last Updated

2023-02-20 (about 3 months ago)

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