![]() ![]() The exploits are a bypass of the fix for the previous vulnerability, CVE-2019-16759, which allows attackers to send a crafted HTTP request with a specified template name and malicious PHP code, and leads to remote code execution. Recently, Unit 42 researchers found exploits in the wild leveraging the vBulletin pre-auth RCE vulnerability CVE-2020-17496. By exploiting this vulnerability, an attacker could have gained privileged access and control over any vBulletin server running versions 5.0.0 up to 5.5.4, and potentially lock organizations out from their own sites. At that time, Unit 42 researchers published a blog on this vBulletin vulnerability, analyzing its root cause and the exploit we found in the wild. Finally, we want to mention that we have updated TrustKeeper scan engine to detect vulnerable instances of vBulletin.In September 2019, a remote code execution (RCE) vulnerability identified as CVE-2019-16759 was disclosed for vBulletin, a popular forum software. vBulletin says they will remove the vulnerable module (PHP Module) entirely in version 5.6.4. VBulletin issued a Security Patch that should be applied in the affected web applications as soon as possible. Please keep in mind this workaround may break some functionality but it will keep you safe from attacks until the patch is applied.
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