Koinonia Link WordPress plugin: Privilege escalation to Administrator
Summary
The Koinonia Link WordPress plugin before version 1.1.5 does not check whether a user is allowed to change roles when saving a role selection from a profile update. Any authenticated user, such as a subscriber, can therefore grant themselves the Administrator role. The attack requires only a valid low-privilege account on the site and no user interaction.
Affected
- Koinonia Link 1.1.2 to 1.1.4
- Versions before 1.1.5 are described as affected in the CVE record; whether 1.1.0 and 1.1.1 are affected is unknown.
Fixed in
- Koinonia Link 1.1.5
Workaround
- No vendor workaround documented. Unknown.
- Interim measures based on general WordPress practice: disable or restrict public user registration, limit access to the profile screen for low-privilege roles, and review recently created administrator accounts.
Exploitation
- No known exploitation in the wild; not listed in CISA KEV at the time of research.
- No public proof of concept confirmed.
- EPSS score reported by a third party: 0.23%.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Update Koinonia Link to version 1.1.5 or later on all WordPress sites, with priority for internet-facing sites.
- Review all administrator accounts for unexpected additions.
- Check logs for user role changes since the plugin was installed.
- Restrict or disable open self-registration where it is not required.
- Monitor for a CISA KEV entry or public proof of concept.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- WPScan vulnerability record wpscan.com
- WordPress.org plugin listing: Koinonia Link wordpress.org
- OpenCVE: CVE-2026-87782 app.opencve.io
- VulnCheck/aggregator record with EPSS data github.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 21:26.
Original description (NVD)
The Koinonia Link WordPress plugin before 1.1.5 does not check that a user is allowed to change roles before saving a role selection submitted with a profile update, allowing any authenticated user, such as a subscriber, to grant themselves the Administrator role.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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