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CVE-2017-17672
CRITICAL
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.
Published: Dec 14, 2017
Modified: Jun 17, 2026
CWE-502
CVSS Metrics
CVSSv3
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products (3)
| Vendor | Product | Version |
|---|---|---|
| vbulletin | vbulletin | * ≥ 5.0.1 |
| vbulletin | vbulletin | 5.0.0 |
| vbulletin | vbulletin | 5.0.0 |
GitHub Security Advisory GHSA-fxrf-cmv6-rm5j
In vBulletin through 5.3.x, there is an unauthenticated deserialization vulnerability that leads...
References (4)
- https://blogs.securiteam.com/index.php/archives/3573 Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/43362/ Exploit, Third Party Advisory, VDB Entry
- https://blogs.securiteam.com/index.php/archives/3573 Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/43362/ Exploit, Third Party Advisory, VDB Entry
Risk Scores
CVSS Score
9.8 / 10
EPSS Score
15.19%
Top 4% most likely to be exploited
Threat Score
43.8 / 100
Data Sources
NVD
EPSS
GitHub