CVE-2021-43498Public exploitNetwork attack vector

Unauthenticated account takeover via truncated reset token

Published Apr 8, 2022 · Updated Aug 4, 2024

Weak password recovery in ATutor 2.2.4 allows remote attackers to reset account passwords through password_reminder.php requests. The endpoint derives a 15-hex-character SHA-1 token from a caller-supplied member ID and day value, then writes the submitted replacement password after comparing that truncated token. No authentication or user interaction is required; a successfully forged token changes the targeted account password and permits account takeover.

CVSS severity7.5
High
EPSS probability1.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password recovery in ATutor 2.2.4 allows remote attackers to reset account passwords through password_reminder.php requests. The endpoint derives a 15-hex-character SHA-1 token from a caller-supplied member ID and day value, then writes the submitted replacement password after comparing that truncated token. No authentication or user interaction is required; a successfully forged token changes the targeted account password and permits account takeover.

The record

CVE
CVE-2021-43498
Published
Apr 8, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-640, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2022CVE 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

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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 exploitPublished

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
T1098Account Manipulation

Public exploit references

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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