CVE-2026-1655 json
EventPrime <= 4.2.8.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Event Modification via 'event_id' Parameter
published 8mo ago modified 4mo ago also EUVD-2026-8054
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
The EventPrime plugin for WordPress is vulnerable to unauthorized post modification due to missing authorization checks in all versions up to, and including, 4.2.8.4. This is due to the save_frontend_event_submission function accepting a user-controlled event_id parameter and updating the corresponding event post without enforcing ownership or capability checks. This makes it possible for authenticated (Customer+) attackers to modify posts created by administrators by manipulating the event_id parameter granted they can obtain a valid nonce.
Patch / fix
- metagauss eventprime 4.2.8.5
Is CVE-2026-1655 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected products
- metagauss EventPrime – Events Calendar, Bookings and Tickets
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/0e2a2769-1309-4aad-8411-4445efea2b66?source=cve
- plugins.trac.wordpress.org /browser/eventprime-event-calendar-management/trunk/includes/class-ep-ajax.php#L741
- plugins.trac.wordpress.org /browser/eventprime-event-calendar-management/trunk/includes/class-ep-ajax.php#L798
- plugins.trac.wordpress.org /browser/eventprime-event-calendar-management/tags/4.2.8.1/includes/class-ep-ajax.php#L798
- plugins.trac.wordpress.org /browser/eventprime-event-calendar-management/tags/4.2.8.1/includes/class-ep-ajax.php#L741
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&new=3455239%40eventprime-event-calendar-management%2Ftrunk&old=3452
Sources
- CVE List CVE-2026-1655
- NVD CVE-2026-1655
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.