CVE-2026-25858 is a critical authentication vulnerability affecting macrozheng mall versions 1.0.3 and prior. The vulnerability arises from a weak password recovery mechanism in the mall-portal password reset workflow. Specifically, the system allows an unauthenticated attacker to initiate a password reset by submitting a victim's telephone number. The API response directly exposes the one-time password (OTP) used for verification, and the backend validates the reset request by simply comparing the provided OTP against a stored value indexed by the telephone number. Crucially, there is no verification of the user's identity or confirmation that the attacker controls the telephone number in question. This design flaw enables attackers to reset passwords for any user account with a known or guessable phone number, effectively allowing remote account takeover without requiring authentication or user interaction. The vulnerability is classified under CWE-640 (Weak Password Recovery Mechanism), highlighting the improper implementation of password reset controls. The CVSS 4.0 vector (AV:N/AC:L/AT:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N) reflects that the attack is network-based, requires no privileges or user interaction, and results in high confidentiality and integrity impact due to unauthorized account access. Although no public exploits have been reported yet, the simplicity of exploitation and severity of impact make this a critical threat for affected users and organizations.

The primary impact of CVE-2026-25858 is unauthorized remote account takeover, which compromises user confidentiality and integrity. Attackers can reset passwords and gain full access to victim accounts, potentially leading to data theft, fraudulent transactions, or further lateral attacks within the affected system. For organizations, this can result in significant reputational damage, regulatory penalties, and loss of customer trust. Since the vulnerability requires only knowledge or guessing of a telephone number, large user bases with publicly available or guessable phone numbers are at high risk. The lack of authentication or user verification in the reset process means attackers can automate mass account compromises. Additionally, compromised accounts could be used to escalate privileges or distribute malware, amplifying the threat. The vulnerability affects all users of macrozheng mall version 1.0.3 and earlier, potentially impacting e-commerce operations relying on this platform worldwide.

To mitigate CVE-2026-25858, organizations should immediately update the password reset workflow to enforce strong user identity verification. This includes: 1) Removing OTP exposure from API responses to prevent attackers from obtaining verification codes. 2) Implementing multi-factor verification methods, such as sending OTPs only to verified contact channels and requiring user confirmation. 3) Validating ownership of the telephone number through out-of-band verification or additional identity proofing before allowing password resets. 4) Rate limiting password reset requests per telephone number and IP address to prevent brute force or enumeration attacks. 5) Logging and monitoring password reset attempts for suspicious activity. 6) Encouraging users to register multiple verified contact methods and enabling account recovery options that require stronger authentication. 7) Applying patches or updates from macrozheng once available, or deploying custom fixes to address the flawed logic. 8) Educating users about phishing and social engineering risks related to password resets. These measures collectively reduce the risk of unauthorized account takeovers and improve overall authentication security.