CVE-2017-17671 Path traversal in n/a
Remote attackers can execute arbitrary PHP code on Windows vBulletin installations by exploiting directory traversal in the routestring parameter.
- 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-2017-17671?
CVE-2017-17671 is a critical path traversal 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
vBulletin through 5.3.x on Windows allows remote PHP code execution because a require_once call is reachable with an unauthenticated request that can include directory traversal sequences to specify an arbitrary pathname, and because ../ traversal is blocked but ..\ traversal is not blocked. For example, an attacker can make an invalid HTTP request containing PHP code, and then make an index.php?routestring= request with enough instances of ".." to reach an Apache HTTP Server log file.
Weakness: CWE-22
Which versions are affected by CVE-2017-17671?
It affects 1 product.
Products include Vbulletin Vbulletin.
How do I fix CVE-2017-17671?
No fix has been published for CVE-2017-17671 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2017-17671 being exploited?
There is no known exploitation of CVE-2017-17671 in the wild and no public exploit code.
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-6378-4h5g-h5vx.