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12 vulnerabilities found for activitypub by automattic
CVE-2026-4338 (GCVE-0-2026-4338)
Vulnerability from nvd – Published: 2026-04-08 06:00 – Updated: 2026-04-08 16:06
VLAI
EPSS
VEX
Title
ActivityPub Routing < 8.0.2 - Unauthenticated Drafts/Scheduled/Pending Posts Disclosure
Summary
The ActivityPub WordPress plugin before 8.0.2 does not properly filter posts to be displayed, allowed unauthenticated users to access drafts/scheduled/pending posts
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-08 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/50f68395-72fc-4f… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 8.0.2
(semver)
|
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CVE-2023-52199 (GCVE-0-2023-52199)
Vulnerability from nvd – Published: 2024-06-11 14:13 – Updated: 2026-04-28 16:09
VLAI
EPSS
VEX
Title
WordPress ActivityPub plugin <= 1.0.5 - Unauthenticated Broken Access Control vulnerability
Summary
Missing Authorization vulnerability in Matthias Pfefferle & Automattic ActivityPub.This issue affects ActivityPub: from n/a through 1.0.5.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-14 16:07 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/vulnerability/act… | vdb-entry |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Matthias Pfefferle & Automattic | ActivityPub |
Affected:
n/a , ≤ 1.0.5
(custom)
|
|
| automattic | activitypub |
Affected:
0 , ≤ 1.0.5
(custom)
cpe:2.3:a:automattic:activitypub:*:*:*:*:*:wordpress:*:* |
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CVE-2023-5057 (GCVE-0-2023-5057)
Vulnerability from nvd – Published: 2023-10-16 19:39 – Updated: 2024-08-02 07:44
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.0 - Contributor+ Stored XSS
Summary
The ActivityPub WordPress plugin before 1.0.0 does not escape user metadata before outputting them in mentions, which could allow users with a role of Contributor and above to perform Stored XSS attacks
Severity
No CVSS data available.
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/58a63507-f0fd-46… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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CVE-2023-3746 (GCVE-0-2023-3746)
Vulnerability from nvd – Published: 2023-10-16 19:39 – Updated: 2025-04-23 16:12
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.1 - Contributor+ Stored XSS
Summary
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
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/c15a6032-6495-47… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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CVE-2023-3707 (GCVE-0-2023-3707)
Vulnerability from nvd – Published: 2023-10-16 19:39 – Updated: 2025-04-23 16:12
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Content Disclosure
Summary
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.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/541bbe4c-3295-40… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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}
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"description": "CWE-639 Authorization Bypass Through User-Controlled Key",
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}
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CVE-2023-3706 (GCVE-0-2023-3706)
Vulnerability from nvd – Published: 2023-10-16 19:39 – Updated: 2025-04-23 16:11
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Title Disclosure
Summary
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
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/daa4d93a-f8b1-48… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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CVE-2026-4338 (GCVE-0-2026-4338)
Vulnerability from cvelistv5 – Published: 2026-04-08 06:00 – Updated: 2026-04-08 16:06
VLAI
EPSS
VEX
Title
ActivityPub Routing < 8.0.2 - Unauthenticated Drafts/Scheduled/Pending Posts Disclosure
Summary
The ActivityPub WordPress plugin before 8.0.2 does not properly filter posts to be displayed, allowed unauthenticated users to access drafts/scheduled/pending posts
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-08 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/50f68395-72fc-4f… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 8.0.2
(semver)
|
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CVE-2023-52199 (GCVE-0-2023-52199)
Vulnerability from cvelistv5 – Published: 2024-06-11 14:13 – Updated: 2026-04-28 16:09
VLAI
EPSS
VEX
Title
WordPress ActivityPub plugin <= 1.0.5 - Unauthenticated Broken Access Control vulnerability
Summary
Missing Authorization vulnerability in Matthias Pfefferle & Automattic ActivityPub.This issue affects ActivityPub: from n/a through 1.0.5.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-14 16:07 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/vulnerability/act… | vdb-entry |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Matthias Pfefferle & Automattic | ActivityPub |
Affected:
n/a , ≤ 1.0.5
(custom)
|
|
| automattic | activitypub |
Affected:
0 , ≤ 1.0.5
(custom)
cpe:2.3:a:automattic:activitypub:*:*:*:*:*:wordpress:*:* |
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CVE-2023-3706 (GCVE-0-2023-3706)
Vulnerability from cvelistv5 – Published: 2023-10-16 19:39 – Updated: 2025-04-23 16:11
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Title Disclosure
Summary
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
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/daa4d93a-f8b1-48… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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CVE-2023-3746 (GCVE-0-2023-3746)
Vulnerability from cvelistv5 – Published: 2023-10-16 19:39 – Updated: 2025-04-23 16:12
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.1 - Contributor+ Stored XSS
Summary
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
Severity
5.4 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/c15a6032-6495-47… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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CVE-2023-5057 (GCVE-0-2023-5057)
Vulnerability from cvelistv5 – Published: 2023-10-16 19:39 – Updated: 2024-08-02 07:44
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.0 - Contributor+ Stored XSS
Summary
The ActivityPub WordPress plugin before 1.0.0 does not escape user metadata before outputting them in mentions, which could allow users with a role of Contributor and above to perform Stored XSS attacks
Severity
No CVSS data available.
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/58a63507-f0fd-46… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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CVE-2023-3707 (GCVE-0-2023-3707)
Vulnerability from cvelistv5 – Published: 2023-10-16 19:39 – Updated: 2025-04-23 16:12
VLAI
EPSS
VEX
Title
ActivityPub for WordPress < 1.0.0 - Subscriber+ Arbitrary Post Content Disclosure
Summary
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.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 16:06 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://wpscan.com/vulnerability/541bbe4c-3295-40… | exploitvdb-entrytechnical-description |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Unknown | ActivityPub |
Affected:
0 , < 1.0.0
(custom)
|
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