Vulnerability-Lookup

GHSA-GW97-553P-FP3J

Vulnerability from github – Published: 2026-08-25 18:31 – Updated: 2026-08-25 18:31

Details

Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\Twig\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent models and query builders using methods like saveQuietly(), deleteQuietly(), increment(), decrement(), and newQuery() to read and modify arbitrary database records, execute arbitrary SQL, and achieve remote code execution by injecting PHP into template code sections.

Severity

8.4 (High)


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

9.3 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-79774"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-693"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-25T16:17:29Z",
    "severity": "CRITICAL"
  },
  "details": "Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\\\Twig\\\\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent models and query builders using methods like saveQuietly(), deleteQuietly(), increment(), decrement(), and newQuery() to read and modify arbitrary database records, execute arbitrary SQL, and achieve remote code execution by injecting PHP into template code sections.",
  "id": "GHSA-gw97-553p-fp3j",
  "modified": "2026-08-25T18:31:54Z",
  "published": "2026-08-25T18:31:54Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63w"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79774"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wintercms/winter/commit/725bbcda232466f7f71381c271c6916573d576e6"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/winter-cms-before-twig-sandbox-escape-via-securitypolicy"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-79774 (GCVE-0-2026-79774)

Vulnerability from cvelistv5 – Published: 2026-08-25 15:16 – Updated: 2026-08-26 16:11

Title

Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy

Summary

Winter CMS versions before 1.2.13 contain an incomplete fix for a Twig sandbox escape vulnerability in System\\Twig\\SecurityPolicy that allows authenticated backend users with template-editing permissions to bypass sandbox restrictions. Attackers can exploit method forwarding through Eloquent models and query builders using methods like saveQuietly(), deleteQuietly(), increment(), decrement(), and newQuery() to read and modify arbitrary database records, execute arbitrary SQL, and achieve remote code execution by injecting PHP into template code sections.

Severity

9.3 (Critical)


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

8.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-26 15:57 UTC

CWE

CWE-693 - Protection Mechanism Failure

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/wintercms/winter/security/advi…	vendor-advisory
https://github.com/wintercms/winter/commit/725bbc…	patch
https://www.vulncheck.com/advisories/winter-cms-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
wintercms	winter	Affected: 1.2.7 , < 1.2.13 (semver) Unaffected: 1.2.13 (semver) cpe:2.3:a:wintercms:winter::::::::

Date Public

2026-08-07 00:00

Credits

M9nx

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JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-79774",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-26T15:57:18.454449Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-26T16:11:03.275Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
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          "vendor": "wintercms",
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              "lessThan": "1.2.13",
              "status": "affected",
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              "versionType": "semver"
            },
            {
              "status": "unaffected",
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            }
          ]
        }
      ],
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          "nodes": [
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                  "versionEndExcluding": "1.2.13",
                  "versionStartIncluding": "1.2.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "M9nx"
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          "lang": "en",
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        }
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      "metrics": [
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            "baseSeverity": "CRITICAL",
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            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
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            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
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            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
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      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-8cfw-pcwh-v63w)",
          "tags": [
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          ],
          "url": "https://github.com/wintercms/winter/security/advisories/GHSA-8cfw-pcwh-v63w"
        },
        {
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        },
        {
          "name": "VulnCheck Advisory: Winter CMS before 1.2.13 Twig Sandbox Escape via SecurityPolicy",
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/winter-cms-before-twig-sandbox-escape-via-securitypolicy"
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  },
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    "datePublished": "2026-08-25T15:16:05.738Z",
    "dateReserved": "2026-08-25T14:29:43.528Z",
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}

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.

Action not permitted

GHSA-GW97-553P-FP3J

CVE-2026-79774 (GCVE-0-2026-79774)

Tags

Sightings

Nomenclature