CVE-2021-24353Public exploitNetwork attack vector

Unauthenticated redirect import via unchecked admin hook

Published Jun 14, 2021 · Updated Aug 3, 2024

Missing authorization in WPDeveloper Simple 301 Redirects 2.0.0 through 2.0.3 allows remote attackers to import site redirects. The import_data function accepts uploaded JSON through unauthenticated admin-post.php and passes decoded entries to process_data without capability or nonce checks. No account is required; imported rules can deny access to the site or redirect visitors to an attacker-selected external site.

CVSS severity8.8
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in WPDeveloper Simple 301 Redirects 2.0.0 through 2.0.3 allows remote attackers to import site redirects. The import_data function accepts uploaded JSON through unauthenticated admin-post.php and passes decoded entries to process_data without capability or nonce checks. No account is required; imported rules can deny access to the site or redirect visitors to an attacker-selected external site.

The record

CVE
CVE-2021-24353
Published
Jun 14, 2021
Updated
Aug 3, 2024
Vendor
WPDeveloper
Product
Simple 301 Redirects
Classifications
CWE-862, T1491.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 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=2.0.0 <2.0.0*
  2. Affected versionversion=2.0.4 <2.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPDeveloper · Simple 301 Redirectsversion=2.0.0 <2.0.0*; version=2.0.4 <2.0.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H
9.9WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1491.002Web Site Defacement

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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