CVE-2021-24857 ToTop Link <= 1.7.1 - Unauthenticated PHP Object Injection
Unauthenticated attackers can achieve code execution via PHP object injection in the ToTop Link WordPress plugin by exploiting unsafe deserialization of user input.
- 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-2021-24857?
CVE-2021-24857 is a critical unsafe deserialization vulnerability in Unknown ToTop Link, published on 13 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The ToTop Link WordPress plugin through 1.7.1 passes base64 encoded user input to the unserialize() PHP function, which could lead to PHP Object injection if a plugin installed on the blog has a suitable gadget chain.
Weakness: CWE-502
Which versions are affected by CVE-2021-24857?
It affects 1 product.
Products include Nocean Totop Link.
How do I fix CVE-2021-24857?
No fix has been published for CVE-2021-24857 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2021-24857 being exploited?
There is no known exploitation of CVE-2021-24857 in the wild and no public exploit code.
Sources
Also known as GHSA-q5c4-rqq9-f524.