MF Gig Calendar <= 1.2.1 - Editor+ Stored XSS

2024-04-1500:00:00

Bob Matyas

mf gig calendar

version 1.2.1

editor+

stored xss

exploit

april 29 2024

update

5.7 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

8.7%

JSON

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

1. Go to "MF Gig Calendar > Settings"
2. In the "Empty Calendar" field, add the payload: `
</textarea><script>alert(/XSS: mfgigcal_settings[message]/)</script>`
3. Click "Save Changes" and see the XSS.