CVE-2021-29023Network attack vector

Account takeover via predictable password-reset tokens

Published May 17, 2021 · Updated Jul 29, 2026

Password-reset weakness in InvoicePlane 1.5.11 allows remote attackers to reset user passwords via predictable reset tokens. Sessions.php generates each token as MD5 of the current time and target email, while reset requests and token guesses lack rate limiting. An unauthenticated requester needs a target user's email and approximate reset-request time; a valid token permits choosing a replacement password.

CVSS severity5.3
Medium
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Password-reset weakness in InvoicePlane 1.5.11 allows remote attackers to reset user passwords via predictable reset tokens. Sessions.php generates each token as MD5 of the current time and target email, while reset requests and token guesses lack rate limiting. An unauthenticated requester needs a target user's email and approximate reset-request time; a valid token permits choosing a replacement password.

The record

CVE
CVE-2021-29023
Published
May 17, 2021
Updated
Jul 29, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-307, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 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?

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

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/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 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-307Improper Restriction of Excessive Authentication Attempts
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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