CVE-2021-24635Network attack vector

Authenticated content disclosure and image upload via AJAX

Published Sep 20, 2021 · Updated Aug 3, 2024

Missing authorization in Visual Link Preview before 2.2.3 allows remote authenticated users to disclose restricted posts and upload images. Several AJAX handlers accept a nonce exposed to every authenticated user without verifying the caller's WordPress capability. Subscriber access is sufficient to search draft titles and content, read password-protected post titles, or import an image from a URL.

CVSS severity5.4
Medium
EPSS probability0.64%
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 Visual Link Preview before 2.2.3 allows remote authenticated users to disclose restricted posts and upload images. Several AJAX handlers accept a nonce exposed to every authenticated user without verifying the caller's WordPress capability. Subscriber access is sufficient to search draft titles and content, read password-protected post titles, or import an image from a URL.

The record

CVE
CVE-2021-24635
Published
Sep 20, 2021
Updated
Aug 3, 2024
Vendor
Bootstrapped Ventures
Product
Visual Link Preview
Classifications
CWE-284, CWE-862, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 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=2.2.3 <2.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Bootstrapped Ventures · Visual Link Previewversion=2.2.3 <2.2.3

Published CVSS scores

5.5NVDAV:N/AC:L/Au:S/C:P/I:P/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-862Missing Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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