CVE-2023-5135 Simple Cloudflare Turnstile <= 1.23.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode
Authenticated contributors can inject arbitrary scripts via shortcode attributes, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-5135?
CVE-2023-5135 is a medium-severity cross-site scripting vulnerability in elliotvs Simple CAPTCHA Alternative with Cloudflare Turnstile, published on 26 Sep 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Simple Cloudflare Turnstile plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'gravity-simple-turnstile' shortcode in versions up to, and including, 1.23.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2023-5135?
It affects 1 product.
Products include Replywp Simple Cloudfare Turnstile.
How do I fix CVE-2023-5135?
No fix has been published for CVE-2023-5135 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-2023-5135 being exploited?
There is no known exploitation of CVE-2023-5135 in the wild and no public exploit code.
Sources
Also known as GHSA-rj9v-45x6-hwjj.