CVE-2023-28015 — The HCL Domino AppDev Pack IAM service is susceptible to a User Account Enumerat

The HCL Domino AppDev Pack IAM service is susceptible to a User Account Enumeration vulnerability. During a failed login attempt a difference in messages could allow an attacker to determine if the user is valid or not. The attacker could use this information to focus a brute for

01What is this vulnerability?

The HCL Domino AppDev Pack IAM service is susceptible to a User Account Enumeration vulnerability. During a failed login attempt a difference in messages could allow an attacker to determine if the user is valid or not. The attacker could use this information to focus a brute force attack on valid users.

02Affected products

Vendor	Product	Versions
HCL Software	Domino AppDev Pack	< 1.0.6

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-05-23T21:25:09.044Z
• Last modified: 2025-01-17T15:22:07.147Z

09References

• support.hcltechsw.com — https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0105093