CVE-2023-0876Known exploitationPublic exploitNetwork attack vector

Subscriber-created redirects via unchecked AJAX update

Published Mar 20, 2023 · Updated Feb 26, 2025

Improper authorization in JoomUnited WP Meta SEO before 4.5.3 allows remote authenticated users to create arbitrary redirects. The startProcess AJAX handler accepts the update_link_redirect task and writes a subscriber-supplied destination to an existing wp_wpms_links redirect entry without a capability check. Subscriber access and a valid plugin nonce are required; visiting the affected WordPress URL then sends users to the attacker-chosen site.

CVSS severity6.1
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in JoomUnited WP Meta SEO before 4.5.3 allows remote authenticated users to create arbitrary redirects. The startProcess AJAX handler accepts the update_link_redirect task and writes a subscriber-supplied destination to an existing wp_wpms_links redirect entry without a capability check. Subscriber access and a valid plugin nonce are required; visiting the affected WordPress URL then sends users to the attacker-chosen site.

The record

CVE
CVE-2023-0876
Published
Mar 20, 2023
Updated
Feb 26, 2025
Vendor
JoomUnited
Product
WP Meta SEO
Classifications
CWE-601
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2025Record 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 <4.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JoomUnited · WP Meta SEOversion=0 <4.5.3

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.1WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
6.1CISA-ADPCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')

Public exploit references

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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