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MEDIUM severity

CVE-2016-15015 — barzahlen-php

MEDIUMFix: viafintech/Barzahlen-PHP@3e7d29d

CVE-2016-15015 is a medium-severity (CVSS 5.3) CWE-208 vulnerability in barzahlen/barzahlen-php. A fix is available for barzahlen/barzahlen-php — see the affected versions and patch details below.

Barzahlen Payment Module PHP SDK vulnerable to Observable Timing Discrepancy

Also known asGHSA-vg5x-6q66-rvgx
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.00%0.39%0.77%1.16%0.4%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘barzahlen/barzahlen-php

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability, which was classified as problematic, was found in viafintech Barzahlen Payment Module PHP SDK up to 2.0.0. Affected is the function verify of the file src/Webhook.php. The manipulation leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitability is told to be difficult. Upgrading to version 2.0.1 is able to address this issue. The patch is identified as 3e7d29dc0ca6c054a6d6e211f32dae89078594c1. It is recommended to upgrade the affected component. VDB-217650 is the identifier assigned to this vulnerability.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistbarzahlen/barzahlen-phpall versions2.0.1composer require barzahlen/barzahlen-php:^2.0.1

Affected Products

1 product · 1 configurations
Application
barzahlen payment module php sdkpaysafe
< 2.0.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for barzahlen/barzahlen-php, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update barzahlen/barzahlen-php to 2.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-15015 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

A vulnerability, which was classified as problematic, was found in viafintech Barzahlen Payment Module PHP SDK up to 2.0.0. Affected is the function verify of the file src/Webhook.php. The manipulation leads to observable timing discrepancy. The complexity of an attack is rather high. The exploitability is told to be difficult. Upgrading to version 2.0.1 is able to address this issue. The patch is identified as 3e7d29dc0ca6c054a6d6e211f32dae89078594c1. It is recommended to upgrade the affected component. VDB-217650 is the identifier assigned to this vulnerability.
O3 Security · Impact-Aware SCA

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CVE-2016-15015: barzahlen-php — Fixed in 2.0.1