CVE-2021-39312 Exploited in the Wild — True Ranker

Vendor	Product	Version	Status
True Ranker	True Ranker	2.2.2 to <= 2.2.2	Affected

Known Exploited Vulnerability Sources

Catalogues that list this CVE as a known exploited vulnerability.

Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.

Source	Added
The Shadowserver First	2026-01-04 00:00 UTC

Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-39312.yaml	Apr 25, 2025

Virtual Patch

Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.

Not available

KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.

Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.

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CVSS Scores

CVSS v3.1 7.5 High

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

Exploitation Status

Exploited in the wild

Recorded 2026-01-04 00:00:00 UTC · The Shadowserver

Proof of concept available

Recorded 2026-06-12 14:20:24 UTC · Nuclei Templates

Weaknesses (CWE)

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Scanner Integrations

Nuclei, Metasploit, and other scanner references for this CVE are listed on the Detection tab.

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

WordPress True Ranker <2.2.4 - Local File Inclusion

nuclei · Created Unknown

Timeline

Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.

12 Jun 2026 14:20 UTC about 2 months ago

12 Jun 2026 14:20 UTC · about 2 months ago

Public PoC available

Public proof-of-concept code published
4 Jan 2026 00:00 UTC 7 months ago

4 Jan 2026 00:00 UTC · 7 months ago

Added to KEVIntel KEV Feed

High-confidence, third-party attested exploitation
25 Apr 2025 00:00 UTC over 1 year ago

25 Apr 2025 00:00 UTC · over 1 year ago

Nuclei template available

Scanner coverage available
14 Dec 2021 15:50 UTC over 4 years ago

14 Dec 2021 15:50 UTC · over 4 years ago

CVE published

Vulnerability disclosed publicly
20 Aug 2021 00:00 UTC almost 5 years ago

20 Aug 2021 00:00 UTC · almost 5 years ago

CVE ID reserved

Identifier reserved by the CNA

Automate This Intelligence with the Pro API

Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Pro API Example

GET /api/v2/pro/kevs/CVE-2021-39312

{
  "cve_id": "CVE-2021-39312",
  "title": "True Ranker <= 2.2.2 Directory Traversal/Arbitrary File Read",
  "affected_vendor": "True Ranker",
  "affected_product": "True Ranker",
  "affected_versions": [
    { "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
  ],
  "confidence": "High",
  "cvss_score": 7.5,
  "epss_score": 0.77944,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "...": "Pro API fields" },
  "proof_of_concepts": [ "..." ],
  "scanner_integrations": [ "..." ]
}

The free JSON API returns basic KEV fields only. Confidence, telemetry, and artifact enrichment require Pro API access.

CVE-2021-39312

At a Glance

Affected Versions

CVE References