CVE-2026-16299Public exploitNetwork attack vector

Account takeover via unauthenticated password reset

Published Aug 10, 2026 · Updated Aug 10, 2026

Improper authentication in Single Sign On For TNG before 2.2.0 allows remote attackers to reset arbitrary WordPress user passwords. The public ssoprocess_ajax action accepts a target email and attacker-chosen password after checking a frontend nonce; version 2.1.0 also trusts an attacker-supplied expiry. With TNG database access configured and the link method unset, a known email and the public nonce suffice to seize any account, including an administrator account with full site control.

CVSS severity9.8
Critical
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Single Sign On For TNG before 2.2.0 allows remote attackers to reset arbitrary WordPress user passwords. The public ssoprocess_ajax action accepts a target email and attacker-chosen password after checking a frontend nonce; version 2.1.0 also trusts an attacker-supplied expiry. With TNG database access configured and the link method unset, a known email and the public nonce suffice to seize any account, including an administrator account with full site control.

The record

CVE
CVE-2026-16299
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
Colin Stearman
Product
Single Sign On For TNG
Classifications
CWE-287, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Colin Stearman · Single Sign On For TNGversion=0 <2.2.0

Published CVSS scores

9.8CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-287Improper Authentication
T1098Account Manipulation

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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