CVE-2026-72699Public exploitNetwork attack vector

Email enumeration via distinct registration responses

Published Aug 25, 2026 · Updated Aug 25, 2026

Email enumeration in the Grav Login plugin before 3.9.1 allows remote attackers to identify registered email addresses via registration responses. The register() method in classes/Login.php throws EMAIL_NOT_AVAILABLE for an existing email but silently continues for a new one. Registration must be enabled and network-reachable; without rate limiting, unauthenticated requests reveal account membership one address at a time.

CVSS severity9.3
Critical
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Email enumeration in the Grav Login plugin before 3.9.1 allows remote attackers to identify registered email addresses via registration responses. The register() method in classes/Login.php throws EMAIL_NOT_AVAILABLE for an existing email but silently continues for a new one. Registration must be enabled and network-reachable; without rate limiting, unauthenticated requests reveal account membership one address at a time.

The record

CVE
CVE-2026-72699
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-203, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.3VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
5.3VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1087Account Discovery

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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