Security readout for executives and security teams
Plain-English summary
Tarkov Data Manager versions up to 2.0.0 allowed unauthenticated users to gain full admin panel access. For exposed deployments, this is a high-impact issue because an attacker could control managed Tarkov item data without credentials.
Executive priority
Treat as an immediate remediation item for any exposed deployment. The business risk is unauthorized administrative control and possible data integrity loss. If the tool is internal-only and network-restricted, prioritize verification and patching promptly but exposure may be lower.
Technical view
The login endpoint was vulnerable to authentication bypass through JavaScript prototype property access combined with loose equality type coercion. The CVSS 3.1 score is 9.8, with network access, low complexity, no privileges, and no user interaction required. CWE mappings include CWE-1321, CWE-287, and CWE-843.
Likely exposure
Exposure is limited to organizations running the-hideout/tarkov-data-manager version 2.0.0 or earlier, especially if the admin panel is reachable from untrusted networks. The sources do not identify hosted services or downstream products.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is still urgent because the advisory describes unauthenticated full admin access with low attack complexity.
Researcher notes
Evidence comes from the CVE record, GitHub advisory, and a referenced fix commit. The source bundle names affected versions as <= 2.0.0 and says a series of fix commits on 02 January 2025 addressed this and other vulnerabilities. No exploit-in-the-wild evidence is provided.
Mitigation direction
- Identify any Tarkov Data Manager deployments and their running version.
- Upgrade to a release or commit set that includes the 02 January 2025 fixes.
- If no packaged release is available, follow the GitHub advisory and maintainer guidance.
- Restrict admin panel access to trusted networks until remediation is confirmed.
- Review admin activity and data changes for suspicious unauthenticated access.
Validation and detection
- Confirm the deployed version is not 2.0.0 or earlier.
- Verify the login endpoint includes the 02 January 2025 authentication fixes.
- Check whether the admin panel is exposed to the internet or untrusted networks.
- Review logs for unexpected admin sessions or data modifications before patching.
- Track the GitHub advisory for any updated remediation details.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-1321: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCWE-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 lookupCWE-843: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupCredential 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 lookupCVE-2026-21854 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-r8w6-9xwg-6h73CVE reference · x_refsource_CONFIRM
- https://github.com/the-hideout/tarkov-data-manager/commit/f188f0abf766cefe3f1b7b4fc6fe9dad3736174aCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Authentication
Improper Authentication represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Access of Resource Using Incompatible Type ('Type Confusion')
Access of Resource Using Incompatible Type ('Type Confusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.