Vulnerability-Lookup

GHSA-R7WW-MW2X-MJ59

Vulnerability from github – Published: 2026-07-21 12:33 – Updated: 2026-07-21 12:33

Details

Grav contains a stored cross-site scripting vulnerability in shortcode-core attribute handlers where the XSS detection scan only matches payloads containing literal angle brackets, allowing shortcode parameters to bypass validation. Attackers with admin.pages permission can inject malicious JavaScript through shortcode attributes that execute in any viewer's browser, including administrators, enabling session hijacking via admin nonce theft.

Severity

5.4 (Medium)


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

5.1 (Medium)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64628"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T12:19:00Z",
    "severity": "MODERATE"
  },
  "details": "Grav contains a stored cross-site scripting vulnerability in shortcode-core attribute handlers where the XSS detection scan only matches payloads containing literal angle brackets, allowing shortcode parameters to bypass validation. Attackers with admin.pages permission can inject malicious JavaScript through shortcode attributes that execute in any viewer\u0027s browser, including administrators, enabling session hijacking via admin nonce theft.",
  "id": "GHSA-r7ww-mw2x-mj59",
  "modified": "2026-07-21T12:33:37Z",
  "published": "2026-07-21T12:33:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64628"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/grav-stored-cross-site-scripting-via-shortcode-attribute-handlers"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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"
    }
  ]
}

CVE-2026-64628 (GCVE-0-2026-64628)

Vulnerability from cvelistv5 – Published: 2026-07-21 11:39 – Updated: 2026-07-23 18:22

Title

Grav Stored Cross-Site Scripting via Shortcode Attribute Handlers

Summary

Severity

5.1 (Medium)


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

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/getgrav/grav/security/advisori…	vendor-advisory
https://www.vulncheck.com/advisories/grav-stored-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
getgrav	grav	Affected: 0 , ≤ 6.2.1 (semver)

Date Public

2026-07-07 00:00

Credits

YuvalMil LeonKaya

Show details on NVD website

JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-64628",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-23T18:19:25.309289Z",
                "version": "2.0.3"
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        },
        "references": [
          {
            "tags": [
              "exploit"
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            "url": "https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph"
          }
        ],
        "title": "CISA ADP Vulnrichment"
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            }
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                }
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        }
      ],
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      },
      "references": [
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          "name": "GitHub Security Advisory (GHSA-q5fw-vpqc-fgph)",
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          "url": "https://github.com/getgrav/grav/security/advisories/GHSA-q5fw-vpqc-fgph"
        },
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          "tags": [
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    "dateReserved": "2026-07-20T11:58:54.524Z",
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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.

Action not permitted

GHSA-R7WW-MW2X-MJ59

CVE-2026-64628 (GCVE-0-2026-64628)

Tags

Sightings

Nomenclature