CVE-2023-1912Public exploitNetwork attack vector

Administrator-session script execution via unescaped forwarded IP

Published Apr 6, 2023 · Updated Apr 8, 2026

Stored XSS in Automattic Limit Login Attempts 1.7.1 and earlier allows remote attackers to execute script in an administrator's browser. The lockout-log renderer stores a spoofable X-Forwarded-For value as an IP address and inserts it into the settings-page table without sanitizing input or escaping output. Exploitation requires nondefault reverse-proxy IP detection and lockout logging, plus an administrator viewing the log; injected script runs with that browser session's privileges.

CVSS severity7.2
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Automattic Limit Login Attempts 1.7.1 and earlier allows remote attackers to execute script in an administrator's browser. The lockout-log renderer stores a spoofable X-Forwarded-For value as an IP address and inserts it into the settings-page table without sanitizing input or escaping output. Exploitation requires nondefault reverse-proxy IP detection and lockout logging, plus an administrator viewing the log; injected script runs with that browser session's privileges.

The record

CVE
CVE-2023-1912
Published
Apr 6, 2023
Updated
Apr 8, 2026
Vendor
Automattic
Product
Limit Login Attempts
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2023CVE 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 <=1.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Automattic · Limit Login Attemptsversion=0 <=1.7.1

Published CVSS scores

7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
6.1NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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