CVE-2021-24356Public exploitNetwork attack vector

Authenticated plugin activation via unchecked AJAX action

Published Jun 14, 2021 · Updated Aug 3, 2024

Missing authorization in WPDeveloper Simple 301 Redirects 2.0.0 through 2.0.3 allows remote authenticated users to activate installed plugins. The simple301redirects/admin/activate_plugin AJAX handler accepts an attacker-controlled plugin basename, validates only a REST nonce available to any signed-in user, and calls activate_plugin() without a capability check. Any authenticated account, including a subscriber, can activate an installed plugin and execute that plugin's initialization behavior under the site's WordPress process.

CVSS severity8.8
High
EPSS probability2.60%
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 authenticated users to activate installed plugins. The simple301redirects/admin/activate_plugin AJAX handler accepts an attacker-controlled plugin basename, validates only a REST nonce available to any signed-in user, and calls activate_plugin() without a capability check. Any authenticated account, including a subscriber, can activate an installed plugin and execute that plugin's initialization behavior under the site's WordPress process.

The record

CVE
CVE-2021-24356
Published
Jun 14, 2021
Updated
Aug 3, 2024
Vendor
WPDeveloper
Product
Simple 301 Redirects
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

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 privilegesauthenticated

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:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/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.

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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-862Missing Authorization

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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