CVE-2020-11063Network attack vector

Backend user enumeration via password-reset timing

Published May 13, 2020 · Updated Dec 3, 2024

Information disclosure in TYPO3 CMS 10.4.0 through 10.4.1 allows remote attackers to enumerate backend user email addresses. The backend LoginController password-reset action returns without a response delay, exposing account existence through processing-time differences. No authentication or user interaction is required; repeated requests disclose only whether a supplied email address belongs to a backend account.

CVSS severity3.7
Low
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in TYPO3 CMS 10.4.0 through 10.4.1 allows remote attackers to enumerate backend user email addresses. The backend LoginController password-reset action returns without a response delay, exposing account existence through processing-time differences. No authentication or user interaction is required; repeated requests disclose only whether a supplied email address belongs to a backend account.

The record

CVE
CVE-2020-11063
Published
May 13, 2020
Updated
Dec 3, 2024
Vendor
in2code GmbH
Product
TYPO3 CMS
Classifications
CWE-204, T1589.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Dec 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 10.4.0, <= 10.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

in2code GmbH · TYPO3 CMSversion=>= 10.4.0, <= 10.4.1

Published CVSS scores

3.7NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
4.3NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
3.7GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
T1589.002Gather Victim Identity Information: Email Addresses

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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