CVE-2025-35432 CISA Thorium does not rate limit account verification email messages
Remote attackers can spam account verification emails to pending users due to missing rate limits, causing resource exhaustion or user annoyance.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-35432?
CVE-2025-35432 is a medium-severity denial of service vulnerability in CISA Thorium, published on 17 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CISA Thorium does not rate limit requests to send account verification email messages. A remote unauthenticated attacker can send unlimited messages to a user who is pending verification. Fixed in 1.1.1 by adding a rate limit set by default to 10 minutes.
Weakness: CWE-400
Which versions are affected by CVE-2025-35432?
It affects 1 product.
Products include Cisa Thorium.
How do I fix CVE-2025-35432?
No fix has been published for CVE-2025-35432 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-35432 being exploited?
There is no known exploitation of CVE-2025-35432 in the wild and no public exploit code.
Other vulnerabilities in CISA Thorium
- CVE-2025-35436 CISA Thorium account verification email error handling
- CVE-2025-35430 CISA Thorium insecure downloaded file path validation
- CVE-2025-35431 CISA Thorium LDAP injection
- CVE-2025-35435 CISA Thorium download stream divide by zero
- CVE-2025-35433 CISA Thorium does not properly invalidate previously used tokens
Sources
Also known as GHSA-wc3h-h5hx-5r6h.