Missing authorization in MemberHero lets subscribers send emails
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-862.
Summary
The MemberHero WordPress plugin through 6.9 does not check capabilities or nonces on one of its AJAX actions. This missing authorization check (CWE-862) lets any authenticated user, such as a subscriber, make the site send arbitrary HTML emails to arbitrary recipients. An attacker can abuse this to relay phishing emails that carry the site's identity and domain reputation. A public exploit is linked in the references.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The MemberHero WordPress plugin through 6.9 does not perform any capability or nonce check on one of its AJAX actions, allowing any authenticated user, such as a subscriber, to make the site send arbitrary HTML emails to arbitrary recipients from its own mail system, which can be abused to relay phishing carrying the site's identity and domain reputation.
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 |
|---|---|---|---|---|---|
| Unknown | MemberHero | up to 6.9 | — | No fix listed | CNA |
- MemberHero VendorUnknown Affected up to 6.9 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for MemberHero.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-11 Threatist record created from CVE-2026-94235
- 2026-10-11 Alias added: GHSA-544m-gj73-rvcj
References
Sources
- CVE-2026-94235 · CVE Program
- CVE-2026-94235 · NVD
- FIRST EPSS
- GHSA-544m-gj73-rvcj · GitHub Advisory Database · CC BY 4.0
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