CVE-2021-24781Public exploitNetwork attack vector

Contributor-level post metadata tampering via unchecked AJAX handler

Published Nov 1, 2021 · Updated Aug 3, 2024

Improper access control in Image Source Control before 2.3.1 allows remote authenticated users to alter arbitrary WordPress post metadata. The isc_save_meta AJAX action accepts caller-selected post IDs, metadata keys, and values without checking whether the account can edit the target post. A Contributor account and an editor-issued nonce are required; successful requests can modify metadata on posts outside that account's control.

CVSS severity4.3
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Image Source Control before 2.3.1 allows remote authenticated users to alter arbitrary WordPress post metadata. The isc_save_meta AJAX action accepts caller-selected post IDs, metadata keys, and values without checking whether the account can edit the target post. A Contributor account and an editor-issued nonce are required; successful requests can modify metadata on posts outside that account's control.

The record

CVE
CVE-2021-24781
Published
Nov 1, 2021
Updated
Aug 3, 2024
Vendor
webgilde GmbH
Product
Image Source Control Lite – Show Image Credits and Captions
Classifications
CWE-284, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 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

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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=2.3.1 <2.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

webgilde GmbH · Image Source Control Lite – Show Image Credits and Captionsversion=2.3.1 <2.3.1

Published CVSS scores

4.3Wordfence IntelligenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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.

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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-284Improper Access Control
T1565.001Stored Data Manipulation

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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