CVE-2024-2123Ultimate Member XSS
Ultimate Member <= 2.8.3 - Unauthenticated Stored Cross-Site Scripting
Published Mar 7, 2024 · Updated Oct 21, 2026 · Also known as WORDFENCE-c8bc1653-8fee-468a-bb6d-f24959846ee5, c8bc1653-8fee-468a-bb6d-f24959846ee5
Key Facts
Patch immediately- CVE-2024-2123 is a medium-severity vulnerability (CVSS 6.1 v3.1) affecting Ultimate Member (Ultimatemember), Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin.
- It is exploited in the wild, listed in Industry KEV feed since Mar 8, 2024. No public exploit code is known.
- EPSS estimates a 27% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ultimate Member 2.8.4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
27%
Higher than 98.0% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
48/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Mar 8, 2024
1 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisoryhttps://www.cve.org/CVERecord?id=CVE-2024-2123
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2024-2123
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/c8bc1653-8fee-468a-bb6d-f24959846ee5?source=api-prod
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/c8bc1653-8fee-468a-bb6d-f24959846ee5?source=api-scan
- advisoryhttps://www.wordfence.com/threat-intel/vulnerabilities/id/c8bc1653-8fee-468a-bb6d-f24959846ee5?source=cve
- patchhttps://plugins.trac.wordpress.org/changeset/3046611/ultimate-member#file746
Description
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the several parameters in all versions up to, and including, 2.8.3 due to insufficient input sanitization and output escaping.
This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Mar 8, 2024 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Ultimate MemberUltimatemember | See advisory | 2.8.4 |
| Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin | See advisory | n/a |
Patched Releases
Ultimate Member
2.8.4
Timeline
Publicly disclosed
Mar 7, 2024
Added to Industry KEV feed
Mar 8, 2024
Last updated
Oct 21, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- advisorycve.org · CVERecord
- advisorynvd.nist.gov · CVE-2024-2123
- advisorywordfence.com · c8bc1653-8fee-468a-bb6d-f24959846ee5
- advisorywordfence.com · c8bc1653-8fee-468a-bb6d-f24959846ee5
- advisorywordfence.com · c8bc1653-8fee-468a-bb6d-f24959846ee5
FAQ
Common Questions.
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the several parameters in all versions up to, and including, 2.8.3 due to insufficient input sanitization and output escaping.
Affected: Ultimate Member (Ultimatemember); Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Mar 8, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Ultimate Member 2.8.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2024-2123 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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