PbootCMS up to 3.2.12 File Upload core/function/file.php black incomplete blacklist

Summaryinfo

A vulnerability has been found in PbootCMS up to 3.2.12 and classified as critical. This impacts an unknown function of the file core/function/file.php of the component File Upload. This manipulation of the argument black causes incomplete blacklist. This vulnerability is registered as CVE-2026-4509. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability has been found in PbootCMS up to 3.2.12 and classified as critical. Affected by this vulnerability is an unknown part of the file core/function/file.php of the component File Upload. The manipulation of the argument black with an unknown input leads to a incomplete blacklist vulnerability. The CWE definition for the vulnerability is CWE-184. The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses. As an impact it is known to affect confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-4509. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1562.006 according to MITRE ATT&CK.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. By approaching the search of inurl:core/function/file.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14239). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

• PbootCMS

Version

• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 3.2.4
• 3.2.5
• 3.2.6
• 3.2.7
• 3.2.8
• 3.2.9
• 3.2.10
• 3.2.11
• 3.2.12

License

• commercial

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #773901: 翱云科技 PbootCMS 3.2.12 Incomplete Identification of Uploaded File Variables (by zmjjkk)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion