8.8

CVE-2026-56053: WordPress EventPrime plugin <= 4.3.4.1 - PHP Object Injection vulnerability

Deferred
Published 25-06-2026Last modified 25-06-2026

Vulnerability summary

CVE-2026-56053 is a high (CVSS 8.8) Deserialization of Untrusted Data vulnerability in eventprime. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43.1% of scored vulnerabilities. Fixed in 4.3.4.2.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 25-06-2026
    Last modifiedVulnerability information updated.

Description

Subscriber PHP Object Injection in EventPrime <= 4.3.4.1 versions.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.52% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Eventprime1 product
Wordpress1 product
  • eventprime-event-calendar-management≤ 4.3.4.1 (fixed in 4.3.4.2)

2 vendors · 2 products

References

2 links