Unauthenticated content disclosure via widget ID lookup
Published Sep 6, 2026 · Updated Sep 6, 2026
Authorization bypass in Diem 5.1.0 through 5.1.3 allows remote attackers to read restricted widget content via a crafted widget_id. The public render and getFull actions in BasedmWidgetActions.class.php look up a DmWidget solely by the supplied ID and render it without loading or authorizing its owning page. No credentials or user interaction are required, but exploitation requires a valid widget ID and exposes only content rendered by protected, inactive, or unpublished pages.
Summary
What happened
Authorization bypass in Diem 5.1.0 through 5.1.3 allows remote attackers to read restricted widget content via a crafted widget_id. The public render and getFull actions in BasedmWidgetActions.class.php look up a DmWidget solely by the supplied ID and render it without loading or authorizing its owning page. No credentials or user interaction are required, but exploitation requires a valid widget ID and exposes only content rendered by protected, inactive, or unpublished pages.
The record
- CVE
- CVE-2026-86183
- Published
- Sep 6, 2026
- Updated
- Sep 6, 2026
- Vendor
- Diem Project
- Product
- Diem
- Classifications
- CWE-639, CWE-285, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 6, 2026CVE publishedPublication date reported by the CVE source.
- Sep 6, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.1.0
- Affected versionversion=5.1.1
- Affected versionversion=5.1.2
- Affected versionversion=5.1.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Public dmWidget endpoint reproduction stepsproof of concept · unverified
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Technologies
Your stack
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Your stack
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