How severe is CVE-2018-20986?

CVE-2018-20986 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-20986 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20986?

CVE-2018-20986 affects Advancedcustomfields Advanced Custom Fields. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20986?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-20986 published?

CVE-2018-20986 was published on 2019-08-22 and last updated on 2026-06-17.

CVE-2018-20986

CVE-2018-20986 is a medium-severity vulnerability in Advancedcustomfields Advanced Custom Fields with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Advancedcustomfields Advanced Custom Fields
Published: 2019-08-22
Last modified: 2026-06-17

Description

The advanced-custom-fields (aka Elliot Condon Advanced Custom Fields) plugin before 5.7.8 for WordPress has XSS by authors.

Frequently asked questions

What is CVE-2018-20986?: The advanced-custom-fields (aka Elliot Condon Advanced Custom Fields) plugin before 5.7.8 for WordPress has XSS by authors.
How severe is CVE-2018-20986?: CVE-2018-20986 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-20986 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20986?: CVE-2018-20986 affects Advancedcustomfields Advanced Custom Fields. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20986?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20986 published?: CVE-2018-20986 was published on 2019-08-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:advancedcustomfields:advanced_custom_fields:*:*:*:*:*:wordpress:*:*

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