CVE-2020-7245Network attack vector

Account takeover via whitespace username collision

Published Jan 23, 2020 · Updated Aug 4, 2024

Authentication bypass in CTFd 2.0.0 through 2.2.2 allows remote attackers to take over accounts through password reset. Registration checks compare an untrimmed username but store its trimmed form, while reset tokens identify users by username, creating a collision with an existing account. Exploitation requires public registration, email-enabled password recovery, and knowledge of the target username; successful use replaces the target account password.

CVSS severity9.8
Critical
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in CTFd 2.0.0 through 2.2.2 allows remote attackers to take over accounts through password reset. Registration checks compare an untrimmed username but store its trimmed form, while reset tokens identify users by username, creating a collision with an existing account. Exploitation requires public registration, email-enabled password recovery, and knowledge of the target username; successful use replaces the target account password.

The record

CVE
CVE-2020-7245
Published
Jan 23, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-640, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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