Cross-site scripting in ultimatemember Ultimate Member – User Profile, Registration…
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Textarea Profile Field with HTML Support (DOM Gadget via id Attribute) in all versions up to, and including, 2.12.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is possible because the wp_kses 'templates' allowlist permits the id attribute on div elements but does not neutralize unescaped quotes within its value; when pickadate.js concatenates the stored id value into an HTML string via jQuery .html() on profile page load, the smuggled onfocus and autofocus attribute syntax breaks out of attribute context and executes as JavaScript.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ultimatemember | Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin | up to 2.12.1 | — | No fix listed | CNA |
- Ultimate Member – User Profile, Registration, Login, Member Directory, Content Restriction & Membership Plugin Vendorultimatemember Affected up to 2.12.1 Fixed in — No fix listed CNA
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ultimatemember:ultimate_member:*:*:*:*:*:*:*:* | — | — | ultimatemember |
- cpe:2.3:a:ultimatemember:ultimate_member:*:*:*:*:*:*:*:* Versions — — ·ultimatemember
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18547
- 2026-10-03 Alias added: GHSA-rhh6-vxq9-rqm4
References
Other 8
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a7961bcc-eae7-40e1-8838-9755c7655500?source=cve
- https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.12.1/includes/core/class-form.php#L853
- https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.12.1/includes/class-functions.php#L580
- https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.12.1/assets/js/common.js#L51
- https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/core/class-form.php#L853
- https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/includes/class-functions.php#L580
- https://plugins.trac.wordpress.org/browser/ultimate-member/tags/2.11.4/assets/js/common.js#L51
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3663931%40ultimate-member&new=3663931%40ultimate-member
More ultimatemember vulnerabilities
- TI-2024-00992 SQL injection in ultimatemember Ultimate Member – User Profile, Registration, Login… CVSS 3.1CRITICAL 9.8
- TI-2023-03232 Ultimate Member < 2.6.7 - Unauthenticated Privilege Escalation CVSS 3.1CRITICAL 9.8
- TI-2022-03726 JobBoardWP < 1.2.2 - Unauthenticated Arbitrary File Upload CVSS 3.1HIGH 7.5
- TI-2020-19304 WordPress Plugin ultimate-member 2.1.3 Local File Inclusion CVSS 4.0MEDIUM 6.8
- TI-2024-01973 Ultimate Member <= 2.8.3 - Unauthenticated Stored Cross-Site Scripting CVSS 3.1HIGH 7.2
- TI-2020-18475 An issue was discovered in the Ultimate Member plugin before 2.1.12 for WordPress, aka… CVSS 3.1CRITICAL 10.0
Sources
- CVE-2026-18547 · CVE Program
- CVE-2026-18547 · NVD
- FIRST EPSS
- GHSA-rhh6-vxq9-rqm4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences