CVE-2025-9543 FlexTable Google Sheets Connector < 3.19.2 - Admin+ Stored XSS
Admins can inject malicious scripts via Google Sheets imports in FlexTable, bypassing unfiltered_html restrictions in multisite setups.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-9543?
CVE-2025-9543 is a low-severity cross-site scripting vulnerability in Unknown FlexTable, published on 5 Jan 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The FlexTable WordPress plugin before 3.19.2 does not sanitise and escape the imported links from Google Sheet cells, 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).
Which versions are affected by CVE-2025-9543?
How do I fix CVE-2025-9543?
No fix has been published for CVE-2025-9543 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-9543 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9543 exists.
Sources
Also known as GHSA-pp2x-6q2q-6v58.