CVE-2021-24187Public exploitNetwork attack vector

Authenticated script execution via unescaped tab parameter

Published Apr 5, 2021 · Updated Aug 3, 2024

Reflected XSS in Clogica SEO Redirection Plugin – 301 Redirect Manager before 6.4 allows remote authenticated users to execute script. The settings page places the tab query parameter into an HTML attribute without proper sanitization, allowing a crafted value to add an event handler. An authenticated user must persuade another logged-in user to open the crafted wp-admin URL; the script then runs in that user's browser context.

CVSS severity5.4
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Clogica SEO Redirection Plugin – 301 Redirect Manager before 6.4 allows remote authenticated users to execute script. The settings page places the tab query parameter into an HTML attribute without proper sanitization, allowing a crafted value to add an event handler. An authenticated user must persuade another logged-in user to open the crafted wp-admin URL; the script then runs in that user's browser context.

The record

CVE
CVE-2021-24187
Published
Apr 5, 2021
Updated
Aug 3, 2024
Vendor
Clogica
Product
SEO Redirection Plugin – 301 Redirect Manager
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 5, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=6.4 <6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Clogica · SEO Redirection Plugin – 301 Redirect Managerversion=6.4 <6.4

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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