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CVE Record

CVE-2026-16299: Single Sign On For TNG < 2.2.0 - Unauthenticated Arbitrary Password Reset

The Single Sign On For TNG WordPress plugin before 2.2.0 does not properly validate a password reset request, allowing unauthenticated attackers to reset the password of arbitrary users, including administrators, which could lead to a full site takeover.

CriticalCVSS 9.8Not KEV-listedUpdated
Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A flaw in Single Sign On For TNG before version 2.2.0 may let an unauthenticated attacker reset any WordPress user’s password, including an administrator’s. Successful abuse could give the attacker full control of the website and its data.

Executive priority

Prioritize immediate identification and remediation of affected sites, especially externally reachable or business-critical WordPress installations. The potential outcome is complete site takeover without credentials or user interaction. Escalate to incident review if unexplained password resets or administrator changes are found.

Technical view

Password-reset requests are not properly validated, creating an authentication failure classified as CWE-287. The issue is remotely reachable, requires no privileges or user interaction, and may compromise confidentiality, integrity, and availability. The supplied CVSS 3.1 score is 9.8.

Likely exposure

WordPress sites running Single Sign On For TNG earlier than 2.2.0 are potentially exposed. Exposure depends on whether the vulnerable plugin and affected password-reset functionality are installed and reachable. The supplied affected-product metadata is incomplete and internally inconsistent, so inventories should verify versions directly.

Exploitation context

The supplied record does not establish active exploitation, and the CVE is not listed as KEV. WPScan is tagged as containing exploit information, but that alone does not prove attacks are occurring. Treat the flaw as readily exploitable based on its network-accessible, low-complexity, unauthenticated CVSS characteristics.

Researcher notes

The stated weakness is CWE-287 with CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The source bundle identifies versions before 2.2.0, but its structured affected entry lists version “0” and defaults to unaffected. This discrepancy limits precise product-range confidence and warrants checking the cited CVE and WPScan records.

Mitigation direction

  • Update Single Sign On For TNG to version 2.2.0 or later.
  • If updating is impossible, disable the plugin and consult vendor guidance.
  • Review administrator accounts and restore any unauthorized credential changes.
  • Rotate potentially affected administrator credentials and invalidate active sessions.

Validation and detection

  • Inventory WordPress sites for Single Sign On For TNG installations.
  • Confirm every installed instance is version 2.2.0 or later.
  • Review password-reset and account activity for unexpected administrator changes.
  • Check for unfamiliar administrators, altered settings, or unauthorized site content.
  • Verify the plugin remains disabled where an update cannot be completed.
Prepared
Confidence
medium
Sources
3

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-287: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-16299 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2026-16299Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
UnknownSingle Sign On For TNG0unaffected
Weakness

CWE details

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-287 · source CWE mapping

Improper Authentication

Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.