Account takeover via retained invalid-token user data
Published Jan 21, 2021 · Updated Jul 9, 2026
Improper authentication in ProjectSend before r1295 allows remote attackers to reset any known user's password without a valid token. In reset-password.php, an invalid token sets an error state but leaves username-derived user data populated, so the POST handler accepts a new password. Knowledge of a username and a CSRF token obtainable from the login form is sufficient to replace that account's password and assume its access.
Summary
What happened
Improper authentication in ProjectSend before r1295 allows remote attackers to reset any known user's password without a valid token. In reset-password.php, an invalid token sets an error state but leaves username-derived user data populated, so the POST handler accepts a new password. Knowledge of a username and a CSRF token obtainable from the login form is sufficient to replace that account's password and assume its access.
The record
- CVE
- CVE-2020-28874
- Published
- Jan 21, 2021
- Updated
- Jul 9, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-404, CWE-287, T1098
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 21, 2021CVE publishedPublication date reported by the CVE source.
- Jul 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- CVE-2020-28874.py password-reset exploitfunctional · demonstrated
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Technologies
Your stack
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Your stack
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