CVE-2026-27398 | WordPress RSVP and Event Management plugin <= 2.7.16 - Broken Access Control vulnerability

Missing Authorization vulnerability in WP Chill RSVP and Event Management allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects RSVP and Event Management: from n/a through 2.7.16.

Published: 2026-05-25 Last update: 2026-05-26 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-27398 is rated Low Risk (26.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.23%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-27398

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.03% 0.23% +0.20%
2 2026-05-26 — 0.03% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-27398

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2026-27398

GitHub Security Advisory for CVE-2026-27398

GHSA-ffph-c23r-mr7q · Severity: medium — Missing Authorization vulnerability in WP Chill RSVP and Event Management allows Exploiting...

Affected software / configurations for CVE-2026-27398

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2026-27398

cvelogic Threat Intelligence