CVE-2023-25135

Public Exploit

Description

vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary code via a crafted HTTP request that triggers deserialization. This occurs because verify_serialized checks that a value is serialized by calling unserialize and then checking for errors. The fixed versions are 5.6.7 PL1, 5.6.8 PL1, and 5.6.9 PL1.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 92.92% Top 5%
Vendor Advisory vbulletin.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.ambionics.io/blog/vbulletin-unserializable-but-unreachable exploit third party advisory technical description
https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4473890-vbulletin-5-6-9-security-patch release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-25135?
CVE-2023-25135 has been scored as a critical severity vulnerability.
How to fix CVE-2023-25135?
To fix CVE-2023-25135, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-25135 being actively exploited in the wild?
It is possible that CVE-2023-25135 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~93% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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