CVE-2023-45132Network attack vector

Unauthenticated WAF bypass via trusted forwarded IP

Published Oct 11, 2023 · Updated Sep 17, 2024

Protection mechanism failure in wargio Naxsi 1.3 through 1.5 allows remote attackers to bypass WAF filtering via a crafted HTTP header. ngx_http_naxsi_update_current_ctx_status trusts the first X-Forwarded-For value and applies IgnoreIP or IgnoreCIDR before checking the socket peer address. Exploitation requires either ignore rule to be configured and lets matching malicious requests reach the protected application without Naxsi inspection.

CVSS severity9.1
Critical
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in wargio Naxsi 1.3 through 1.5 allows remote attackers to bypass WAF filtering via a crafted HTTP header. ngx_http_naxsi_update_current_ctx_status trusts the first X-Forwarded-For value and applies IgnoreIP or IgnoreCIDR before checking the socket peer address. Exploitation requires either ignore rule to be configured and lets matching malicious requests reach the protected application without Naxsi inspection.

The record

CVE
CVE-2023-45132
Published
Oct 11, 2023
Updated
Sep 17, 2024
Vendor
wargio
Product
Naxsi
Classifications
CWE-693, T1562.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=>= 1.3, < 1.6
  2. Affected versionversion=1.3 <1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

wargio · Naxsiversion=>= 1.3, < 1.6; version=1.3 <1.6

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-693Protection Mechanism Failure
T1562.001Impair Defenses: Disable or Modify Tools

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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