CVE-2021-24644Public exploitNetwork attack vector

Authenticated local file inclusion via unsanitized tab parameter

Published Nov 23, 2021 · Updated Aug 3, 2024

Local file inclusion in KubiQ Images to WebP before 1.9 allows remote authenticated users to execute local PHP files via the tab parameter. The plugin passes the unsanitized tab value directly to include(), allowing traversal outside the plugin directory and inclusion of a chosen existing PHP file. Access to the WordPress upload administration page is required, and successful exploitation executes that file in the website context.

CVSS severity7.5
High
EPSS probability4.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local file inclusion in KubiQ Images to WebP before 1.9 allows remote authenticated users to execute local PHP files via the tab parameter. The plugin passes the unsanitized tab value directly to include(), allowing traversal outside the plugin directory and inclusion of a chosen existing PHP file. Access to the WordPress upload administration page is required, and successful exploitation executes that file in the website context.

The record

CVE
CVE-2021-24644
Published
Nov 23, 2021
Updated
Aug 3, 2024
Vendor
KubiQ
Product
Images to WebP
Classifications
CWE-22, T1190
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

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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