CVE-2026-4604 json
Klubraum Membership Request <= 1.1.0 - Missing Authorization to Unauthenticated Arbitrary Plugin Settings Update
published 3mo ago modified 3mo ago also EUVD-2026-50267
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
The Klubraum Membership Request plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `kr_mr_store_settings()` function in all versions up to, and including, 1.1.0. This makes it possible for unauthenticated attackers to update the plugin's settings, including the Klubraum API token and introduction text, effectively hijacking the plugin's integration with the Klubraum service.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- klubraum Klubraum Membership Request
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/09e158d2-f9a6-41a6-a91f-1763a1a44b04?source=cve
- plugins.trac.wordpress.org /browser/klubraum-membership-request/trunk/admin/class-klubraum-membership-request-widget-admin.php#L152
- plugins.trac.wordpress.org /browser/klubraum-membership-request/tags/1.1.0/admin/class-klubraum-membership-request-widget-admin.php#L152
- plugins.trac.wordpress.org /browser/klubraum-membership-request/tags/1.1.0/admin/class-klubraum-membership-request-widget-admin.php#L151
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&new=3491619%40klubraum-membership-request%2Ftrunk%2Fadmin%2Fclass-k
Sources
- CVE List CVE-2026-4604
- NVD CVE-2026-4604
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.