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Vulnerability record · CVE-2023-3707 · published 16 October 2023

CVE-2023-3707: Automattic activitypub vulnerability

Automattic · Activitypub

The ActivityPub WordPress plugin before 1.0.0 does not ensure that post contents to be displayed are public and belong to the plugin, allowing any authenticated user, such as subscriber to retrieve the content of arbitrary post (such as draft and private) via an IDOR vector. Password protected posts are not affected by this issue.

4.3 CVSS 3.1 Medium EPSS 0.57% · top 55.3%
4.3CVSS 3.1 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The ActivityPub WordPress plugin before 1.0.0 does not ensure that post contents to be displayed are public and belong to the plugin, allowing any authenticated user, such as subscriber to retrieve the content of arbitrary post (such as draft and private) via an IDOR vector. Password protected posts are not affected by this issue.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://wpscan.com/vulnerability/541bbe4c-3295-4073-901d-763556269f48 ExploitThird Party Advisory
https://wpscan.com/vulnerability/541bbe4c-3295-4073-901d-763556269f48 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2026-4338Automattic activitypub vulnerabilityThe ActivityPub WordPress plugin before 8.0.2 does not properly filter posts to be displayed, allowed unauthenticated users to access drafts/schedule…EPSS 0.44%5.4CVE-2023-5057Automattic activitypub vulnerabilityThe ActivityPub WordPress plugin before 1.0.0 does not escape user metadata before outputting them in mentions, which could allow users with a role o…EPSS 0.42%5.4CVE-2023-3746Automattic activitypub vulnerabilityThe ActivityPub WordPress plugin before 1.0.0 does not sanitize and escape some data from post content, which could allow contributor and above role …EPSS 0.50%4.3CVE-2023-3706Automattic activitypub vulnerabilityThe ActivityPub WordPress plugin before 1.0.0 does not ensure that post titles to be displayed are public and belong to the plugin, allowing any auth…EPSS 0.57%

Source: NIST National Vulnerability Database (record CVE-2023-3707), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.