Vulnerability-Lookup

GHSA-3JP5-3H47-28QF

Vulnerability from github – Published: 2026-09-18 16:40 – Updated: 2026-09-18 16:40

Summary

Semantic MediaWiki has reflected XSS in Special:Ask plain table headers

Details

Failure mode

When headers=plain, table header text was emitted into <th> via a raw HTML path. User-controlled mainlabel content could therefore become executable HTML.

Remediation

TableResultPrinter now applies output-context escaping before passing plain headers to the table renderer.
The fix is limited to the HTML/plain-header branch so safe rendering modes are unaffected.

Why this is the right layer

The header value is not a structural token; it is display data. Sanitizing it at the sink is correct because the renderer owns the final HTML emission.

Severity

6.1 (Medium)


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

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 7.1.0"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "mediawiki/semantic-media-wiki"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-77606"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-18T16:40:36Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "#### Failure mode\n\nWhen `headers=plain`, table header text was emitted into `\u003cth\u003e` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML.\n\n#### Remediation\n\n- `TableResultPrinter` now applies output-context escaping before passing plain headers to the table renderer.\n- The fix is limited to the HTML/plain-header branch so safe rendering modes are unaffected.\n\n#### Why this is the right layer\n\nThe header value is not a structural token; it is display data. Sanitizing it at the sink is correct because the renderer owns the final HTML emission.",
  "id": "GHSA-3jp5-3h47-28qf",
  "modified": "2026-09-18T16:40:36Z",
  "published": "2026-09-18T16:40:36Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-3jp5-3h47-28qf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Semantic MediaWiki has reflected XSS in Special:Ask plain table headers"
}

CVE-2026-77606 (GCVE-0-2026-77606)

Vulnerability from cvelistv5 – Published: 2026-09-18 16:41 – Updated: 2026-09-18 16:41

Title

Semantic MediaWiki has reflected XSS in Special:Ask plain table headers

Summary

Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki's pages. Prior to version 7.2.0, when `headers=plain`, table header text was emitted into `<th>` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML. Version 7.2.0 fixes the issue.

Severity

6.1 (Medium)


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

CWE

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

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/SemanticMediaWiki/SemanticMedi…	x_refsource_CONFIRM
https://github.com/SemanticMediaWiki/SemanticMedi…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
SemanticMediaWiki	SemanticMediaWiki	Affected: < 7.2.0

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "SemanticMediaWiki",
          "vendor": "SemanticMediaWiki",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Semantic MediaWiki is a free, open-source extension to MediaWiki that lets users store and query data within the wiki\u0027s pages. Prior to version 7.2.0, when `headers=plain`, table header text was emitted into `\u003cth\u003e` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML. Version 7.2.0 fixes the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T16:41:42.731Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-3jp5-3h47-28qf",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-3jp5-3h47-28qf"
        },
        {
          "name": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-3jp5-3h47-28qf",
        "discovery": "UNKNOWN"
      },
      "title": "Semantic MediaWiki has reflected XSS in Special:Ask plain table headers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-77606",
    "datePublished": "2026-09-18T16:41:42.731Z",
    "dateReserved": "2026-08-20T20:48:20.507Z",
    "dateUpdated": "2026-09-18T16:41:42.731Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.