How severe is CVE-2018-6943?

CVE-2018-6943 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-6943 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6943?

CVE-2018-6943 affects Ultimatemember. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6943?

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

When was CVE-2018-6943 published?

CVE-2018-6943 was published on 2018-02-16 and last updated on 2026-06-17.

CVE-2018-6943

CVE-2018-6943 is a medium-severity vulnerability in Ultimatemember with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ultimatemember
Published: 2018-02-16
Last modified: 2026-06-17

Description

core/lib/upload/um-image-upload.php in the UltimateMember plugin 2.0 for WordPress has a cross-site scripting vulnerability because it fails to properly sanitize user input passed to the $temp variable.

Frequently asked questions

What is CVE-2018-6943?: core/lib/upload/um-image-upload.php in the UltimateMember plugin 2.0 for WordPress has a cross-site scripting vulnerability because it fails to properly sanitize user input passed to the $temp variable.
How severe is CVE-2018-6943?: CVE-2018-6943 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-6943 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6943?: CVE-2018-6943 affects Ultimatemember. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6943?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-6943 published?: CVE-2018-6943 was published on 2018-02-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ultimatemember:ultimatemember:2.0:*:*:*:*:wordpress:*:*

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