Intel

AIKIDO-2025-10982

pingencom/pingen2-sdk-php is vulnerable to Observable Timing Discrepancy

Observable Timing Discrepancy Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.
Published Dec 26, 2025

20

Low Risk

This Affects:

PHPpingencom/pingen2-sdk-php
2.10.0 - 2.19.1
Fixed in 2.20.0
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TL;DR

Affected versions of this package are vulnerable to a Timing Attack on webhook signature verification due to the use of a non-constant-time string comparison function (like a simple === operator) when validating the Signature header against the HMAC hash, allowing an attacker to exploit minute timing differences in the comparison operation to iteratively guess the correct HMAC signature and forge malicious webhook requests.

Who does this affect?

You are affected if you are using a version that falls within the vulnerable range.

Background info

pingencom/pingen2-sdk-php is vulnerable to Observable Timing Discrepancy in versions 2.10.0 - 2.19.1.

How to fix this

Upgrade the pingencom/pingen2-sdk-php library to the patch version.