13 vulnerabilities classified as CWE-625 (宽松定义的正则表达式). AI Chinese analysis included.
CWE-625 represents a critical input validation weakness where regular expressions fail to adequately restrict the set of allowed values. This flaw typically arises when developers omit anchors, such as start and end markers, causing the pattern to match substrings rather than the entire target string. Attackers exploit this by injecting malicious payloads that partially satisfy the permissive pattern, potentially bypassing security controls or triggering downstream vulnerabilities like injection attacks. To mitigate this risk, developers must rigorously define regex boundaries using explicit start and end anchors. Additionally, implementing strict input validation libraries and conducting thorough code reviews ensures that patterns evaluate complete strings rather than accepting dangerous partial matches, thereby closing the gap between intended and actual validation logic.
$phone = GetPhoneNumber(); if ($phone =~ /\d+-\d+/) { # looks like it only has hyphens and digits system("lookup-phone $phone"); } else { error("malformed number!"); }import subprocess import re def validate_ip_regex(ip: str): ip_validator = re.compile(r"((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}") if ip_validator.match(ip): return ip else: raise ValueError("IP address does not match valid pattern.") def run_ping_regex(ip: str): validated = validate_ip_regex(ip) # The ping command treats zero-prepended IP addresses as octal result = subprocess.call(["ping", validated]) print(result)Vulnerabilities classified as CWE-625 (宽松定义的正则表达式) represent 13 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.