7.1

CVE-2023-30777: advancedcustomfields advanced_custom_fields Cross-site Scripting

CVSS: 7.1v3.1HighModified
Published 10-05-2023Last modified 28-04-2026
Open JSON

Vulnerability summary

CVE-2023-30777 is a high (CVSS 7.1) Cross-site Scripting vulnerability in advancedcustomfields advanced_custom_fields. EPSS estimates a 39.00% chance of exploitation in the next 30 days, higher than 98.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
46/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
39.00%
0%100%
High · +0.23 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 10-05-2023
    PublishedVulnerability first disclosed.
  2. 28-04-2026
    Last modifiedVulnerability information updated.

Description

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in WP Engine Advanced Custom Fields Pro, WP Engine Advanced Custom Fields plugins <= 6.1.5 versions.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

39.00%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

+0.23 pp

From 38.77% on 21-09-2026

21-09-202621-10-2026
EPSS score
39.00%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (patchstack.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Wordpress2 products
  • advanced-custom-fields≥ 5.8.10, ≤ 5.12.5 (fixed in 5.12.6) | ≥ 6.0.0, ≤ 6.1.5 (fixed in 5.12.6)
  • advanced-custom-fields-pro≥ 5.8.10, ≤ 5.12.5 (fixed in 5.12.6) | ≥ 6.0.0, ≤ 6.1.5 (fixed in 5.12.6)
Wp engine2 products
Advancedcustomfields1 product

3 vendors · 5 products

References

4 links