cve.bz

CWE-138: Improper Neutralization of Special Elements

Filter

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as control elements or syntactic markers when they are sent to a downstream component.

What the weakness is: CWE-138 at MITRE. All weaknesses

Related attack patterns (CAPEC): 3
  • CAPEC-15 Command Delimiters Likelihood: High · Severity: High
  • CAPEC-34 HTTP Response Splitting Likelihood: Medium · Severity: High
  • CAPEC-105 HTTP Request Splitting Likelihood: Medium · Severity: High

The attack patterns MITRE's CAPEC relates to CWE-138, as MITRE names them. Credits.

Ask an AI about CWE-138

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CWE-138: Improper Neutralization of Special Elements and how to prevent and detect it in code. Use https://cwe.mitre.org/data/definitions/138.html and https://cve.bz/cve/cwe/138?via=ask-ai-copy for recent CVEs with this weakness. Cite the sources.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this weakness's id and public links.

  1. 7.5CVE-2026-55841EPSS 0.6%

    Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/cod…

  2. 7.5CVE-2026-26129EPSS 1.1%

    Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

  3. 7.5CVE-2026-32178EPSS 2.3%

    Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.

  4. 5.3CVE-2026-20009EPSS 0.4%

    A vulnerability in the implementation of the proprietary SSH stack with SSH key-based authentication in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to log in to a Cisco S…

  5. 4.2CVE-2025-48939EPSS 0.2%

    tarteaucitron.js is a compliant and accessible cookie banner. Prior to version 1.22.0, a vulnerability was identified in tarteaucitron.js where document.currentScript was accessed without verifying that it referenced an actual <script> ele…

  6. 5.5CVE-2025-5878EPSS 0.5%

    A vulnerability was found in ESAPI esapi-java-legacy and classified as problematic. This issue affects the interface Encoder.encodeForSQL of the SQL Injection Defense. An attack leads to an improper neutralization of special elements. The …

  7. 7.5CVE-2024-51500EPSS 0.4%

    Meshtastic firmware is a device firmware for the Meshtastic project. The Meshtastic firmware does not check for packets claiming to be from the special broadcast address (0xFFFFFFFF) which could result in unexpected behavior and potential …

  8. 7.8CVE-2024-38133EPSS 0.7%

    Windows Kernel Elevation of Privilege Vulnerability

  9. 9.6CVE-2023-7012EPSS 0.3%

    Insufficient data validation in Permission Prompts in Google Chrome prior to 117.0.5938.62 allowed an attacker who convinced a user to install a malicious app to potentially perform a sandbox escape via a malicious file. (Chromium security…

  10. 9.8CVE-2023-42117EPSS 6.7%

    Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vu…

  11. 5.4CVE-2023-22288EPSS 0.4%

    HTML Email Injection in Tribe29 Checkmk <=2.1.0p23; <=2.0.0p34, and all versions of Checkmk 1.6.0 allows an authenticated attacker to inject malicious HTML into Emails

  12. 8.0CVE-2022-2429EPSS 0.9%

    The Ultimate SMS Notifications for WooCommerce plugin for WordPress is vulnerable to CSV Injection in versions up to, and including, 1.4.1 via the 'Export Utility' functionality. This makes it possible for authenticated attackers, such as …

  13. 7.2CVE-2022-0024EPSS 1.6%

    A vulnerability exists in Palo Alto Networks PAN-OS software that enables an authenticated network-based PAN-OS administrator to upload a specifically created configuration that disrupts system processes and potentially execute arbitrary c…

  14. 8.8CVE-2016-0750EPSS 2.4%

    The hotrod java client in infinispan before 9.1.0.Final automatically deserializes bytearray message contents in certain events. A malicious user could exploit this flaw by injecting a specially-crafted serialized object to attain remote c…