CVE-2017-17672 Deserialization in n/a
Unauthenticated attackers can exploit unsafe deserialization in vBulletin to delete arbitrary files or execute code via the template cache API.
- 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-2017-17672?
CVE-2017-17672 is a critical unsafe deserialization vulnerability in Vbulletin Vbulletin, published on 14 Dec 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In vBulletin through 5.3.x, there is an unauthenticated deserialization vulnerability that leads to arbitrary file deletion and, under certain circumstances, code execution, because of unsafe usage of PHP's unserialize() in vB_Library_Template's cacheTemplates() function, which is a publicly exposed API. This is exploited with the templateidlist parameter to ajax/api/template/cacheTemplates.
Weakness: CWE-502
Which versions are affected by CVE-2017-17672?
It affects 1 product.
Products include Vbulletin Vbulletin.
How do I fix CVE-2017-17672?
No fix has been published for CVE-2017-17672 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-2017-17672 being exploited?
There is no known exploitation of CVE-2017-17672 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Vbulletin Vbulletin
- CVE-2020-17496 vBulletin PHP Module Remote Code Execution
- CVE-2019-16759 vBulletin PHP Module Remote Code Execution
- CVE-2025-48827 vBulletin 5.0.0 through 5.7.5 and 6.0.0 through 6.0.3 allows unauthenticated users to invoke protected API controllers' methods when running
- CVE-2023-25135 Deserialization in n/a
- CVE-2020-7373 Code injection in n/a
Sources
Also known as GHSA-fxrf-cmv6-rm5j.