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Weakness (CWE)

CWE-602: Client-Side Enforcement of Server-Side Security

Class Draft

The product includes a server that relies on the client to implement a protection mechanism that is intended to protect the server.

How to prevent it (2 mitigations)

  1. Architecture and Design

    For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

    Even though client-side checks provide minimal benefits with respect to server-side security, they are still useful. First, they can support intrusion detection. If the server receives input that should have been rejected by the client, then it may be an indication of an attack. Second, client-side error-checking can provide helpful feedback to the user about the expectations for valid input. Third, there may be a reduction in server-side processing time for accidental input errors, although this is typically a small savings.

  2. Architecture and Design

    If some degree of trust is required between the two entities, then use integrity checking and strong authentication to ensure that the inputs are coming from a trusted source. Design the product so that this trust is managed in a centralized fashion, especially if there are complex or numerous communication channels, in order to reduce the risks that the implementer will mistakenly omit a check in a single code path.

Source: MITRE CWE-602

All Critical High Medium Low Exploited only Public exploit

5 results · Clear filters · Feed

  • High 7.7
    CVE-2026-67363 Public exploit

    Joomla Extension - balbooa.com - Pre-auth Payment Amount Tampering in Balbooa Forms < 2.4.3.2

    Joomla Extension - balbooa.com - Pre-auth Payment Amount Tampering in Balbooa Forms < 2.4.3.2 - The stripeCharges and payAuthorize endpoints accept the charge total from a client-controlled request parameter and forward it to the payment gateway without recom…

    balbooa.com Balbooa Forms extension for Joomla Web / CMS
  • Critical 9.9
    CVE-2026-72867 Public exploit

    Dokploy: Incomplete fix of CVE-2026-45628: Command Injection via Unvalidated Branch Fields in Compose Deployment Pipeline (server-side regex missing in compose.ts)

    Dokploy is a free, self-hostable Platform as a Service (PaaS). From 0.29.3 until 0.29.13, the incomplete fix for CVE-2026-45628 leaves packages/server/src/db/schema/compose.ts branch fields without server-side validation, allowing a direct compose.update requ…

    Dokploy dokploy
  • Critical 9.8
    CVE-2024-12603 Public exploit

    A logic vulnerability in the the mobile application (com.transsion.applock) can lead to bypassing the application passw…

    TECNO com.transsion.applock
  • High 7.1
    CVE-2024-23666 Public exploit

    A client-side enforcement of server-side security in Fortinet FortiAnalyzer-BigData at least version 7.4.0 and 7.2.0 th…

    Fortinet FortiManager FortiAnalyzer Network devices
  • High 7.5
    CVE-2020-8162 Public exploit

    Circumvention of file size limits in ActiveStorage

    A client side enforcement of server side security vulnerability exists in rails < 5.2.4.2 and rails < 6.0.3.1 ActiveStorage's S3 adapter that allows the Content-Length of a direct file upload to be modified by an end user bypassing upload limits.

    rails rails activestorage Debian Ubuntu RubyGems