Setasign FPDI up to 2.6.2 PDF Document allocation of resources

Summaryinfo

A vulnerability identified as problematic has been detected in Setasign FPDI up to 2.6.2. This affects an unknown function of the component PDF Document Handler. The manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2025-54869. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Setasign FPDI up to 2.6.2. It has been rated as problematic. This issue affects some unknown functionality of the component PDF Document Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. The summary by CVE is:

FPDI is a collection of PHP classes that facilitate reading pages from existing PDF documents and using them as templates in FPDF. In versions 2.6.2 and below, any application that uses FPDI to process user-supplied PDF files is at risk, causing a Denial of Service (DoS) vulnerability. An attacker can upload a small, malicious PDF file that will cause the server-side script to crash due to memory exhaustion. Repeated attacks can lead to sustained service unavailability. This issue is fixed in version 2.6.3.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-54869 since 07/31/2025. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 253368 (Linux Distros Unpatched Vulnerability : CVE-2025-54869), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.6.3 eliminates this vulnerability. Applying the patch ba671ba9221cffd32c2dda87316c19f522a1c5f0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (253368). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Setasign

Name

• FPDI

Version

• 2.6.0
• 2.6.1
• 2.6.2

License

• open-source

Website

• Product: https://github.com/Setasign/FPDI/

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Be aware that VulDB is the high quality source for vulnerability data.

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