Cyber Resilience

CVE-2026-29788

Wikitide Tsportal ≤ 30

Public PoC
Published
06 March 2026
Modified
11 March 2026
Patch / advisory
View advisory
CVSS Score v4 8.4
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:L/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0026 18th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-29788 is a high-severity Unverified Ownership (CWE-283) vulnerability in Wikitide Tsportal. Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 18th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to AC-24 (Access Control Decisions) and AC-25 (Reference Monitor) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-29788 is a vulnerability in TSPortal, the WikiTide Foundation’s in-house platform used by the Trust and Safety team to manage reports, investigations, appeals, and transparency work. Prior to version 30, the platform's conversion of empty strings to null enables attackers to disguise DPA reports as genuine self-deletion reports. Published on 2026-03-06, the issue carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) and maps to CWE-283 and CWE-1287.

Unauthenticated attackers can exploit this vulnerability over the network with low attack complexity and no user interaction. By submitting specially crafted reports that exploit the string-to-null conversion, they can misrepresent DPA reports as self-deletion reports, achieving high integrity impact through manipulation of report processing and potentially misleading Trust and Safety workflows.

The vulnerability has been patched in TSPortal version 30. Advisories recommend upgrading to this version or later. Further details are provided in the GitHub security advisory at https://github.com/miraheze/TSPortal/security/advisories/GHSA-gfhq-7499-f3f2 and the Miraheze issue tracker at https://issue-tracker.miraheze.org/T15053.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability Data

TSPortal is the WikiTide Foundation’s in-house platform used by the Trust and Safety team to manage reports, investigations, appeals, and transparency work. Prior to version 30, conversion of empty strings to null allows disguising DPA reports as genuine self-deletion reports.…

more

This issue has been patched in version 30.

CWE(s)
CWE-283CWE-1287

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-33541Same product: Wikitide Tsportal
CVE-2025-8556Shared CWE-1287
CVE-2025-59259Shared CWE-1287
CVE-2025-59278Shared CWE-1287
CVE-2025-30027Shared CWE-1287
CVE-2025-54525Shared CWE-1287
CVE-2024-6858Shared CWE-1287
CVE-2025-20086Shared CWE-1287
CVE-2026-4773Shared CWE-1287
CVE-2025-9524Shared CWE-1287

Affected Assets

wikitide
tsportal
≤ 30

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 4 hardening rules · 4 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V1.1.1
  • V1.4.2
  • V2.1.1
  • V2.2.2

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement good match

Access enforcement directly requires verifying ownership before granting access to resources.

AC-24 Access Control Decisions good match

Requiring access decisions to consider all relevant attributes includes ownership verification.

AC-25 Reference Monitor good match

A reference monitor provides the tamperproof mechanism that can enforce ownership checks.

SI-10 Information Input Validation good match

SI-10 directly requires validation of information inputs, which structurally prevents type-validation failures from being introduced or exploitable.

AC-16 Security and Privacy Attributes partial match

Associating ownership as a security attribute enables subsequent verification of resource ownership.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-05 mostly match
prevents

Enforcing defined access permissions and authorizations directly prevents missing ownership verification for resources.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require proper input type validation during development.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect type-validation flaws but does not prevent them during development.

A.5.15 Access control partial match
prevents

Access control policies can require ownership verification before granting access to critical resources.

A.5.16 Identity management partial match
degrades

Identity management processes can include verification of resource ownership during provisioning and access decisions.

A.5.18 Access rights partial match
prevents

Access rights reviews can enforce checks that only legitimate owners retain privileges over critical assets.

A.8.2 Privileged access rights partial match
prevents

Privileged access rights assignment should verify ownership to prevent unauthorized elevation on critical resources.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation and type checking to prevent improper type handling.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Windows Server 2016 (1 rule)
  • V-224831 Local volumes must use a format that supports NTFS attributes. prevents CWE-283
Windows Server 2019 (1 rule)
  • V-205663 Windows Server 2019 local volumes must use a format that supports NTFS attributes. prevents CWE-283

References