What is CVE-2023-3706?

CVE-2023-3706 is a medium-severity vulnerability in Automattic Activitypub, classified under CWE-639 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY. CVSS score: 4.3/10. Published 2023-10-16.

How severe is CVE-2023-3706?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2023-3706 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Automattic Activitypub

CVE-2023-3706

The 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 authenticated user, such as subscriber to retrieve the title of arbitrary post (such as draft and private) via an IDOR vector

Published 2023-10-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.001

Affected products

Automattic Activitypub
Activitypub — versions 0

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/daa4d93a-f8b1-4809-a18e-8ab63a05de5a (Exploit, technical-description, Third Party Advisory, exploit, vdb-entry)

Frequently asked questions

What is CVE-2023-3706?: CVE-2023-3706 is a medium-severity vulnerability in Automattic Activitypub, classified under CWE-639 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY. CVSS score: 4.3/10. Published 2023-10-16.
How severe is CVE-2023-3706?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2023-3706 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.