CVE-2021-24334Public exploitNetwork attack vector

Stored XSS via unsanitized image dimension settings

Published Jun 1, 2021 · Updated Aug 3, 2024

Stored XSS in Connekt Media Instant Images before 4.4.0.1 lets remote authenticated users inject script through plugin settings. The settings handler saves the unsplash_download_w and unsplash_download_h values after client-side-only validation, without server-side sanitization. An authenticated administrator can store code that executes when another user views the affected WordPress administration page.

CVSS severity5.4
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored XSS in Connekt Media Instant Images before 4.4.0.1 lets remote authenticated users inject script through plugin settings. The settings handler saves the unsplash_download_w and unsplash_download_h values after client-side-only validation, without server-side sanitization. An authenticated administrator can store code that executes when another user views the affected WordPress administration page.

The record

CVE
CVE-2021-24334
Published
Jun 1, 2021
Updated
Aug 3, 2024
Vendor
Connekt Media
Product
Instant Images
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.4.0.1 <4.4.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Connekt Media · Instant Imagesversion=4.4.0.1 <4.4.0.1

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo