CVE-2021-38343Network attack vector

Administrator redirect via unvalidated POST destination

Published Aug 30, 2021 · Updated Sep 17, 2024

Open redirect in Hook & Filter Nested Pages 3.1.15 and earlier allows remote attackers to redirect administrators through crafted POST requests. The npBulkActions, npBulkEdit, npListingSort, and npCategoryFilter admin_post handlers redirect to the unvalidated page parameter. An administrator must visit an attacker-controlled page; the redirect can conceal chained CSRF activity or lead to phishing content.

CVSS severity4.7
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in Hook & Filter Nested Pages 3.1.15 and earlier allows remote attackers to redirect administrators through crafted POST requests. The npBulkActions, npBulkEdit, npListingSort, and npCategoryFilter admin_post handlers redirect to the unvalidated page parameter. An administrator must visit an attacker-controlled page; the redirect can conceal chained CSRF activity or lead to phishing content.

The record

CVE
CVE-2021-38343
Published
Aug 30, 2021
Updated
Sep 17, 2024
Vendor
Hook & Filter
Product
Nested Pages
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=3.1.15 <=3.1.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hook & Filter · Nested Pagesversion=3.1.15 <=3.1.15

Published CVSS scores

4.7WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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