CVE-2022-4534Network attack vector

Login protection bypass via spoofed proxy header

Published Oct 8, 2024 · Updated Apr 8, 2026

IP address spoofing in WP-Buy Limit Login Attempts (Spam Protection) 5.3 and earlier allows remote attackers to bypass login blocks. The login.php address-selection logic accepts a client-supplied X-Forwarded-For value as the source address for request logging and login restrictions without establishing a trusted proxy. No authentication is required; a forged header causes the plugin to attribute attempts to a different address, evading address- or country-based blocks.

CVSS severity5.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IP address spoofing in WP-Buy Limit Login Attempts (Spam Protection) 5.3 and earlier allows remote attackers to bypass login blocks. The login.php address-selection logic accepts a client-supplied X-Forwarded-For value as the source address for request logging and login restrictions without establishing a trusted proxy. No authentication is required; a forged header causes the plugin to attribute attempts to a different address, evading address- or country-based blocks.

The record

CVE
CVE-2022-4534
Published
Oct 8, 2024
Updated
Apr 8, 2026
Vendor
WP-Buy
Product
Limit Login Attempts (Spam Protection)
Classifications
CWE-348
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 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 <=5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WP-Buy · Limit Login Attempts (Spam Protection)version=0 <=5.3

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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.

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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-348Use of Less Trusted Source

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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