CVE-2023-6961Known exploitationNetwork attack vector

Unauthenticated stored XSS via unescaped Referer header

Published May 2, 2024 · Updated Apr 8, 2026

Stored XSS in JoomUnited WP Meta SEO 4.5.12 and earlier allows remote attackers to inject scripts through a crafted Referer header. The Referer-handling path stores the untrusted header and later renders it into a page without sufficient sanitization or output escaping. No authentication is required to inject the payload, but execution occurs when a user accesses the affected page.

CVSS severity7.2
High
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in JoomUnited WP Meta SEO 4.5.12 and earlier allows remote attackers to inject scripts through a crafted Referer header. The Referer-handling path stores the untrusted header and later renders it into a page without sufficient sanitization or output escaping. No authentication is required to inject the payload, but execution occurs when a user accesses the affected page.

The record

CVE
CVE-2023-6961
Published
May 2, 2024
Updated
Apr 8, 2026
Vendor
JoomUnited
Product
WP Meta SEO
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 2, 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 <=4.5.12
  2. Affected versionversion=- <=4.5.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JoomUnited · WP Meta SEOversion=0 <=4.5.12; version=- <=4.5.12

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.2WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 exploitationReported
Public exploitUnconfirmed

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

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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