CVE-2026-89334 (GCVE-0-2026-89334)
Vulnerability from cvelistv5 – Published: 2026-09-19 02:27 – Updated: 2026-09-19 02:27
VLAI
EPSS
VEX
Title
Better Messages <= 2.15.33 - Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via '/thread/<id>' REST Endpoint
Summary
The Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.15.33. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to access the full message transcript, thread metadata, and user data of any chat-room thread without authentication. This is only exploitable when the chat room's only_joined_can_read setting retains its default value of '0'.
Severity
6.5 (Medium)
CWE
- CWE-862 - Missing Authorization
Assigner
References
9 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| wordplus | Better Messages – Chat Rooms, Group Chat, Private Messages & AI Chat Bots |
Affected:
0 , ≤ 2.15.33
(semver)
|
guessed |
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}
],
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"description": "CWE-862 Missing Authorization",
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"providerMetadata": {
"dateUpdated": "2026-09-19T02:27:10.950Z",
"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
"shortName": "Wordfence"
},
"references": [
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"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/b3243fe4-9d11-49f0-884b-0162cd776993?source=cve"
},
{
"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/rest-api.php#L2598"
},
{
"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/rest-api.php#L181"
},
{
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},
{
"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3533"
},
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},
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"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3601"
},
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},
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"url": "https://plugins.trac.wordpress.org/changeset?old_path=bp-better-messages%2Ftags%2F2.15.33%2Finc%2Ffunctions.php\u0026new_path=bp-better-messages%2Ftags%2F3.0.0%2Finc%2Ffunctions.php"
}
],
"timeline": [
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"lang": "en",
"time": "2026-09-11T16:14:05.000Z",
"value": "Vendor Notified"
},
{
"lang": "en",
"time": "2026-09-18T13:52:39.000Z",
"value": "Disclosed"
}
],
"title": "Better Messages \u003c= 2.15.33 - Missing Authorization to Authenticated (Custom+) Chat-Room Transcript Disclosure via \u0027/thread/\u003cid\u003e\u0027 REST Endpoint"
}
},
"cveMetadata": {
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"datePublished": "2026-09-19T02:27:10.950Z",
"dateReserved": "2026-09-11T15:59:00.768Z",
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"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2",
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"version": "0",
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"cveTags": [],
"descriptions": [
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"value": "The Better Messages \u2013 Chat Rooms, Group Chat, Private Messages \u0026 AI Chat Bots plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.15.33. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with custom-level access and above, to access the full message transcript, thread metadata, and user data of any chat-room thread without authentication. This is only exploitable when the chat room\u0027s only_joined_can_read setting retains its default value of \u00270\u0027."
}
],
"id": "CVE-2026-89334",
"lastModified": "2026-09-19T03:17:16.893",
"metrics": {
"cvssMetricV31": [
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"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
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"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
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"impactScore": 3.6,
"source": "security@wordfence.com",
"type": "Primary"
}
]
},
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"references": [
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"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3533"
},
{
"source": "security@wordfence.com",
"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3582"
},
{
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"url": "https://plugins.trac.wordpress.org/browser/bp-better-messages/tags/2.15.33/inc/functions.php#L3601"
},
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},
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"value": "CWE-862"
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],
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"type": "Primary"
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}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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