Vulnerability-Lookup

CVE-2026-76213 (GCVE-0-2026-76213)

Vulnerability from cvelistv5 – Published: 2026-08-19 14:01 – Updated: 2026-08-19 15:07

Title

phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttle

Summary

phpMyFAQ before 4.1.7 contains a brute-force vulnerability in the two-factor authentication step where the failure counter is session-scoped and reset on each successful password re-authentication. Attackers with a valid password can bypass the five-attempt limit by obtaining a fresh session cookie and repeatedly re-authenticating to reset the counter, enabling unbounded TOTP code guessing.

Severity

9.1 (Critical)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

7.4 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 15:05 UTC

CWE

CWE-307 - Improper Restriction of Excessive Authentication Attempts

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
https://github.com/thorsten/phpMyFAQ/security/adv…	vendor-advisory
https://www.vulncheck.com/advisories/phpmyfaq-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
thorsten	phpMyFAQ	Affected: 0 , < 4.1.7 (semver) Unaffected: 4.1.7 (semver) cpe:2.3:a:phpmyfaq:phpmyfaq::::::::

Date Public

2026-08-04 00:00

Credits

arpitjain099

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-76213

Vulnerability from fkie_nvd - Published: 2026-08-19 14:17 - Updated: 2026-09-01 15:20

Severity

7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

References

URL	Tags
disclosure@vulncheck.com	https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f98m-hcjv-7rp9	Exploit, Mitigation, Vendor Advisory
disclosure@vulncheck.com	https://www.vulncheck.com/advisories/phpmyfaq-before-2fa-brute-force-via-session-scoped-throttle	Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f98m-hcjv-7rp9	Exploit, Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	phpmyfaq	phpmyfaq	*

JSON

To clipboard

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    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f98m-hcjv-7rp9"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-307"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-XGJH-9VCX-V63Q

Vulnerability from github – Published: 2026-08-19 15:32 – Updated: 2026-08-19 15:32

Details

Severity

7.4 (High)


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

9.1 (Critical)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-76213"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-307"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-19T14:17:47Z",
    "severity": "CRITICAL"
  },
  "details": "phpMyFAQ before 4.1.7 contains a brute-force vulnerability in the two-factor authentication step where the failure counter is session-scoped and reset on each successful password re-authentication. Attackers with a valid password can bypass the five-attempt limit by obtaining a fresh session cookie and repeatedly re-authenticating to reset the counter, enabling unbounded TOTP code guessing.",
  "id": "GHSA-xgjh-9vcx-v63q",
  "modified": "2026-08-19T15:32:33Z",
  "published": "2026-08-19T15:32:33Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-f98m-hcjv-7rp9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76213"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/phpmyfaq-before-2fa-brute-force-via-session-scoped-throttle"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-76213 (GCVE-0-2026-76213)

FKIE_CVE-2026-76213

GHSA-XGJH-9VCX-V63Q

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Nomenclature

Related by attack behaviour