How severe is CVE-2020-6859?

CVE-2020-6859 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2020-6859 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6859?

CVE-2020-6859 affects Ultimatemember Ultimate Member. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-6859?

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

When was CVE-2020-6859 published?

CVE-2020-6859 was published on 2020-01-13 and last updated on 2026-06-17.

CVE-2020-6859

CVE-2020-6859 is a medium-severity vulnerability in Ultimatemember Ultimate Member with a CVSS 3.x base score of 5.3. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-639
Affected product: Ultimatemember Ultimate Member
Published: 2020-01-13
Last modified: 2026-06-17

Description

Multiple Insecure Direct Object Reference vulnerabilities in includes/core/class-files.php in the Ultimate Member plugin through 2.1.2 for WordPress allow remote attackers to change other users' profiles and cover photos via a modified user_id parameter. This is related to ajax_image_upload and ajax_resize_image.

Frequently asked questions

What is CVE-2020-6859?: Multiple Insecure Direct Object Reference vulnerabilities in includes/core/class-files.php in the Ultimate Member plugin through 2.1.2 for WordPress allow remote attackers to change other users' profiles and cover photos via a modified user_id parameter. This is related to ajax_image_upload and ajax_resize_image.
How severe is CVE-2020-6859?: CVE-2020-6859 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2020-6859 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6859?: CVE-2020-6859 affects Ultimatemember Ultimate Member. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-6859?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-6859 published?: CVE-2020-6859 was published on 2020-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ultimatemember:ultimate_member:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Ultimatemember Ultimate Member

CVE-2020-36157 — Critical (CVSS 10.0): An issue was discovered in the Ultimate Member plugin before 2.1.12 for WordPress, aka Unauthenticated Privilege…
CVE-2020-36155 — Critical (CVSS 10.0): An issue was discovered in the Ultimate Member plugin before 2.1.12 for WordPress, aka Unauthenticated Privilege…
CVE-2020-36156 — Critical (CVSS 9.9): An issue was discovered in the Ultimate Member plugin before 2.1.12 for WordPress, aka Authenticated Privilege…
CVE-2024-1071 — Critical (CVSS 9.8): The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin…
CVE-2023-3460 — Critical (CVSS 9.8): The Ultimate Member WordPress plugin before 2.6.7 does not prevent visitors from creating user accounts with arbitrary…
CVE-2019-10270 — High (CVSS 8.8): An arbitrary password reset issue was discovered in the Ultimate Member plugin 2.39 for WordPress. It is possible (due…

All CVEs affecting Ultimatemember Ultimate Member →

Other CWE-639 (Authorization Bypass Through User-Controlled Key (IDOR)) vulnerabilities

CVE-2025-40805 — Critical (CVSS 10.0): Affected devices do not properly enforce user authentication on specific API endpoints. This could facilitate an…
CVE-2024-45032 — Critical (CVSS 10.0): A vulnerability has been identified in Industrial Edge Management Pro (All versions < V1.9.5), Industrial Edge…
CVE-2026-34037 — Critical (CVSS 9.9): Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to…
CVE-2026-52782 — Critical (CVSS 9.9): OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is an IDOR through…
CVE-2026-45552 — Critical (CVSS 9.9): Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. In versions 8.2.6.4 and prior,…
CVE-2026-29200 — Critical (CVSS 9.9): A critical IDOR vulnerability has been discovered in Comet Backup affecting all versions from 20.11.0 to 26.1.1 and…

Browse all CWE-639 (Authorization Bypass Through User-Controlled Key (IDOR)) vulnerabilities →