FKIE_CVE-2021-29487

Vulnerability from fkie_nvd - Published: 2021-08-26 19:15 - Updated: 2026-06-17 03:47
Severity
7.4 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
octobercms in a CMS platform based on the Laravel PHP Framework. In affected versions of the october/system package an attacker can exploit this vulnerability to bypass authentication and takeover of and user account on an October CMS server. The vulnerability is exploitable by unauthenticated users via a specially crafted request. This only affects frontend users and the attacker must obtain a Laravel secret key for cookie encryption and signing in order to exploit this vulnerability. The issue has been patched in Build 472 and v1.1.5.
References
security-advisories@github.comhttps://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5Patch, Third Party Advisory
Impacted products
Vendor Product Version
octobercms october *
octobercms october *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "october",
          "vendor": "octobercms",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.471, \u003c 1.0.472"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.1.1, \u003c 1.1.5"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "32CA477B-7437-4DB8-891D-05E1297E36FB",
              "versionEndExcluding": "1.0.472",
              "versionStartIncluding": "1.0.471",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2E79163B-046D-4BA9-82C9-70AB3A000D69",
              "versionEndExcluding": "1.1.5",
              "versionStartIncluding": "1.1.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "octobercms in a CMS platform based on the Laravel PHP Framework. In affected versions of the october/system package an attacker can exploit this vulnerability to bypass authentication and takeover of and user account on an October CMS server. The vulnerability is exploitable by unauthenticated users via a specially crafted request. This only affects frontend users and the attacker must obtain a Laravel secret key for cookie encryption and signing in order to exploit this vulnerability. The issue has been patched in Build 472 and v1.1.5."
    },
    {
      "lang": "es",
      "value": "octobercms en una plataforma CMS basada en el framework PHP Laravel. En las versiones afectadas del paquete october/system un atacante puede explotar esta vulnerabilidad para omitir la autenticaci\u00f3n y hacerse con una cuenta de usuario en un servidor de October CMS. La vulnerabilidad puede ser explotada por usuarios no autenticados por medio de una petici\u00f3n especialmente dise\u00f1ada. Esto s\u00f3lo afecta a usuarios del frontend y el atacante debe obtener una clave secreta de Laravel para el cifrado y la firma de cookies con el fin de explotar esta vulnerabilidad. El problema ha sido parcheado en el Build 472 y en la versi\u00f3n v1.1.5."
    }
  ],
  "id": "CVE-2021-29487",
  "lastModified": "2026-06-17T03:47:44.653",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.8,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2021-08-26T19:15:07.160",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/octobercms/library/commit/016a297b1bec55d2e53bc889458ed2cb5c3e9374"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/octobercms/library/commit/5bd1a28140b825baebe6becd4f7562299d3de3b9"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/octobercms/october/security/advisories/GHSA-h76r-vgf3-j6w5"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    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.