CVE-2021-24641Public exploitNetwork attack vector

Remote settings tampering via missing CSRF checks

Published Nov 23, 2021 · Updated Aug 3, 2024

Cross-Site Request Forgery in KubiQ Images to WebP before 1.9 allows remote attackers to alter settings or disrupt service via crafted requests. Administrative handlers in upload.php and admin-ajax.php omit CSRF validation, allowing attacker-controlled forms to submit settings, inject malformed extension patterns that damage .htaccess, or invoke arbitrary image conversion. A logged-in WordPress user must load the attacker page; the documented impact is integrity and availability, with no confidentiality access.

CVSS severity8.1
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-Site Request Forgery in KubiQ Images to WebP before 1.9 allows remote attackers to alter settings or disrupt service via crafted requests. Administrative handlers in upload.php and admin-ajax.php omit CSRF validation, allowing attacker-controlled forms to submit settings, inject malformed extension patterns that damage .htaccess, or invoke arbitrary image conversion. A logged-in WordPress user must load the attacker page; the documented impact is integrity and availability, with no confidentiality access.

The record

CVE
CVE-2021-24641
Published
Nov 23, 2021
Updated
Aug 3, 2024
Vendor
KubiQ
Product
Images to WebP
Classifications
CWE-352, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 23, 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=1.9 <1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

KubiQ · Images to WebPversion=1.9 <1.9

Published CVSS scores

5.8NVDAV:N/AC:M/Au:N/C:N/I:P/A:P
8.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

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-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

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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