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Vulnerability record · CVE-2023-3746 · published 16 October 2023

CVE-2023-3746: Automattic activitypub vulnerability

Automattic · Activitypub

The ActivityPub WordPress plugin before 1.0.0 does not sanitize and escape some data from post content, which could allow contributor and above role to perform Stored Cross-Site Scripting attacks

5.4 CVSS 3.1 Medium EPSS 0.43% · top 65.4%
5.4CVSS 3.1 base score
0.43%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 sanitize and escape some data from post content, which could allow contributor and above role to perform Stored Cross-Site Scripting attacks

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

Affected products

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

References

LinkTags
https://wpscan.com/vulnerability/c15a6032-6495-47a8-828c-37e55ed9665a ExploitThird Party Advisory
https://wpscan.com/vulnerability/c15a6032-6495-47a8-828c-37e55ed9665a 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%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 0.47%4.3CVE-2023-3707Automattic activitypub vulnerabilityThe 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 au…EPSS 0.47%

Source: NIST National Vulnerability Database (record CVE-2023-3746), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.