Security readout for executives and security teams
Plain-English summary
CVE-2026-1655 affects the EventPrime WordPress plugin. A logged-in low-privileged user may alter event posts, including administrator-created events, if they can obtain a valid nonce. The business impact is content integrity loss, not server takeover. It is rated medium severity and is not listed as actively exploited in KEV.
Executive priority
Address during the next WordPress maintenance window, sooner for sites with open registration or many customer accounts. The issue can damage public event content and trust, but available evidence does not indicate full site compromise or active exploitation.
Technical view
EventPrime up to and including 4.2.8.4 has missing authorization checks in save_frontend_event_submission. A user-controlled event_id can cause updates to another event post without ownership or capability validation. The issue maps to CWE-862 with CVSS 3.1 score 4.3: network-reachable, low complexity, low privileges, integrity impact only.
Likely exposure
Exposure is limited to WordPress sites running EventPrime versions up to 4.2.8.4 with authenticated users capable of reaching the frontend event submission flow. Sites allowing public registration or customer/subscriber accounts have higher practical exposure. Anonymous users are not described as affected.
Exploitation context
The attacker must be authenticated and obtain a valid nonce. Sources do not state public exploit availability or active exploitation, and this CVE is not marked KEV. The likely outcome is unauthorized modification of existing event content rather than data theft or code execution.
Researcher notes
The source bundle describes affected versions through 4.2.8.4, but the included affected metadata is inconsistent. The title says Subscriber+ while the description says Customer+. A WordPress Trac changeset is referenced, but the bundle does not clearly name a fixed release. Validate against vendor and Wordfence before closing.
Mitigation direction
- Inventory WordPress sites running the EventPrime plugin.
- Check whether installed EventPrime versions are 4.2.8.4 or earlier.
- Follow vendor or WordPress plugin guidance for the fixed release.
- Restrict low-privileged account creation where feasible until remediated.
- Disable frontend event submission if not business-critical.
- Review administrator-created events for unauthorized changes.
Validation and detection
- Confirm EventPrime plugin version on each WordPress site.
- Review user roles that can access event submission features.
- Audit event post revision history for low-privileged edits.
- Check plugin changelog or WordPress Trac changeset for authorization-related fixes.
- Verify remediation guidance against Wordfence and official plugin sources.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-862: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-1655 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0e2a2769-1309-4aad-8411-4445efea2b66?source=cveCVE reference
- https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/includes/class-ep-ajax.php#L741CVE reference
- https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.2.8.1/includes/class-ep-ajax.php#L798CVE reference
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3455239%40eventprime-event-calendar-management%2Ftrunk&old=3452796%40eventprime-event-calendar-management%2Ftrunk&sfp_email=&sfph_mail=CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Authorization
Missing Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.