5.3

CVE-2026-27398: wordpress rsvp Missing Authorization

CVSS: 5.3v3.1MediumDeferred
Published 25-05-2026Last modified 26-05-2026
Open JSON

Vulnerability summary

CVE-2026-27398 is a medium (CVSS 5.3) Missing Authorization vulnerability in wordpress rsvp. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 20.7% of scored vulnerabilities. Fixed in 2.7.17.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.29%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-05-2026
    PublishedVulnerability first disclosed.
  2. 26-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.29%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

+0.06 pp

From 0.23% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.29%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Wordpress1 product
  • rsvp≤ 2.7.16 (fixed in 2.7.17)
Wp chill1 product

2 vendors · 2 products

References

2 links