8.3

CVE-2026-56063: bplugins mailchimp block Missing Authorization

CVSS: 8.3v3.1HighDeferred
Published 26-06-2026Last modified 26-06-2026
Open JSON

Vulnerability summary

CVE-2026-56063 is a high (CVSS 8.3) Missing Authorization vulnerability in bplugins mailchimp block. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.4% of scored vulnerabilities.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.3/10
010
High · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-06-2026
    PublishedVulnerability first disclosed.
  2. 26-06-2026
    Last modifiedVulnerability information updated.

Description

Unauthenticated Broken Access Control in MailChimp Block <= 1.1.15 versions.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

0.00 pp

From 0.30% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.30%

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

Bplugins1 product
Wordpress1 product
  • block-for-mailchimp≤ 1.1.15 (fixed in 1.1.16)

2 vendors · 2 products

References

2 links