Crelly Slider <= 1.4.5 - Admin+ Stored XSS

2024-04-1500:00:00

Bob Matyas

crelly slider

admin

stored xss

exploit

update required

april 29 2024

5.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

8.8%

JSON

Description The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

1. Go to "Crelly Slider"
2. Add a slider
3. In the "callback" field add the payload `</textarea><script>alert(1)</script>`
4. Click "Save Settings"
5. Navigate away and then back and "edit" the slider to see the XSS