ActivityPub <= 0.17.0 — Authenticated (Subscriber+) Insecure Direct Object Reference to Sensitive Post Title Exposure
CVE-2023-3706Published · Updated Action summary
Affected: ≤0.17.0Update to 1.0.0 or newer
All remediation steps- Severity
- Medium4.3
- CVSS
- 4.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:NIntegrity- None
A:NAvailability- None
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
ActivityPub activitypub
- Affected≤ 0.17.0
- Patched in1.0.0
Update to 1.0.0 or newer.
You are affected if you run ≤ 0.17.0. Version 1.0.0 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under ActivityPub.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 1.0.0, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch ActivityPub to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Erwan LR.
The ActivityPub plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 0.17.0 due to missing validation on a user controlled key. This can allow authenticated attackers, with subscriber-level permissions and above, to expose potentially sensitive post titles (e.g., draft and private post titles).
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in ActivityPub
All 6| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.5 | Unauthenticated Information Epxosure <8.0.2Update to 8.0.2 | CVE-2026-4338 | |
| Medium5.3 | Missing Authorization ≤1.0.5Update to 1.0.6 | CVE-2023-52199 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via Post Content ≤0.17.0Update to 1.0.0 | CVE-2023-3746 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting via User Metadata ≤0.17.0Update to 1.0.0 | CVE-2023-5057 | |
| Medium6.5 | Authenticated (Subscriber+) Insecure Direct Object Reference to Sensitive Post Content Exposure ≤0.17.0Update to 1.0.0 | CVE-2023-3707 |
- High7.5Unauthenticated Information Epxosure
<8.0.2Update to 8.0.2
- Medium5.3Missing Authorization
≤1.0.5Update to 1.0.6
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via Post Content
≤0.17.0Update to 1.0.0
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting via User Metadata
≤0.17.0Update to 1.0.0
- Medium6.5Authenticated (Subscriber+) Insecure Direct Object Reference to Sensitive Post Content Exposure
≤0.17.0Update to 1.0.0
Timeline
CVE published
Severity medium, CVSS 4.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.