5.3

CVE-2026-39601: wordpress booking Race Condition

CVSS: 5.3v3.1MediumDeferred
Published 02-10-2026Last modified 05-10-2026
Open JSON

Vulnerability summary

CVE-2026-39601 is a medium (CVSS 5.3) Race Condition vulnerability in wordpress booking. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.3% of scored vulnerabilities. Fixed in 11.9.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (wordfence)
EPSS score
0.16%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-10-2026
    PublishedVulnerability first disclosed.
  2. 05-10-2026
    Last modifiedVulnerability information updated.

Description

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in WPdevelop Booking Calendar booking allows Leveraging Race Conditions.This issue affects Booking Calendar: from n/a through 11.8.4.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

03-10-202621-10-2026
EPSS score
0.16%

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
  • booking≤ 11.8.4 (fixed in 11.9)
Wpdevelop1 product

2 vendors · 2 products

References

2 links