CVE-2023-6506Network attack vector

Arbitrary email sending via unchecked user key

Published Jan 11, 2024 · Updated Apr 8, 2026

Authorization bypass in Melapress WP 2FA 2.5.0 and earlier allows remote authenticated users to email arbitrary site users. The send_backup_codes_email handler trusts a request-supplied user key without validating that the referenced account belongs to the caller. Subscriber access is sufficient; the bounded effect is triggering email delivery to other registered users, not reading or changing their account data.

CVSS severity4.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Melapress WP 2FA 2.5.0 and earlier allows remote authenticated users to email arbitrary site users. The send_backup_codes_email handler trusts a request-supplied user key without validating that the referenced account belongs to the caller. Subscriber access is sufficient; the bounded effect is triggering email delivery to other registered users, not reading or changing their account data.

The record

CVE
CVE-2023-6506
Published
Jan 11, 2024
Updated
Apr 8, 2026
Vendor
Melapress
Product
WP 2FA
Classifications
CWE-732, CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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?

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

  1. Affected versionversion=0 <=2.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Melapress · WP 2FAversion=0 <=2.5.0

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
CWE-639Authorization Bypass Through User-Controlled Key

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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