Vulnerability-Lookup

GHSA-W836-5GPM-7R93

Vulnerability from github – Published: 2026-01-21 01:00 – Updated: 2026-01-21 01:00

Summary

SiYuan has a Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon

Details

Summary

Reflected XSS in /api/icon/getDynamicIcon due to unsanitized SVG input.

Details

The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript.

PoC

Payload: test</text><script>alert(window.origin)</script><text>

Open any note and click Change Icon -> Dynamic (Text).
Change color and paste the payload into the Custom field and click on this icon.
Intercept and send the request or get path from devtools
The JavaScript payload executes afted open URL.

Impact

Arbitrary JavaScript execution in the user's session context if the SVG is loaded directly. It also prevents using legitimate characters like < or > in icon text.

Note

Tested version:

Severity ?

4.6 (Medium)


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

2.1 (Low)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/siyuan-note/siyuan/kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20260118021606-5c0cc375b475"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-23847"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-21T01:00:44Z",
    "nvd_published_at": "2026-01-19T20:15:49Z",
    "severity": "LOW"
  },
  "details": "### Summary\nReflected XSS in /api/icon/getDynamicIcon due to unsanitized SVG input.\n### Details\nThe endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG \u003ctext\u003e tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript.\n\n### PoC\nPayload: `test\u003c/text\u003e\u003cscript\u003ealert(window.origin)\u003c/script\u003e\u003ctext\u003e`\n\n1. Open any note and click Change Icon -\u003e Dynamic (Text).\n\u003cimg width=\"713\" height=\"373\" alt=\"image\" src=\"https://github.com/user-attachments/assets/8a4f5ec4-81d6-46cb-8872-841cb2188ed8\" /\u003e\n\n2.  Change color  and paste the payload into the Custom field and click on this icon.\n\u003cimg width=\"935\" height=\"682\" alt=\"image\" src=\"https://github.com/user-attachments/assets/24d28fbd-a3ce-44f1-a5bb-2cc3f711faf5\" /\u003e\n\n3. Intercept and send the request or get path from devtools \n\u003cimg width=\"1229\" height=\"627\" alt=\"image\" src=\"https://github.com/user-attachments/assets/3cfb1d9a-5a23-476c-86cc-f9a7de6bbe32\" /\u003e\n\u003cimg width=\"1140\" height=\"764\" alt=\"image\" src=\"https://github.com/user-attachments/assets/2657e44f-3724-4136-a53f-75068945aef0\" /\u003e\n\n4. The JavaScript payload executes afted open URL.\n\u003cimg width=\"701\" height=\"809\" alt=\"image\" src=\"https://github.com/user-attachments/assets/343ad67a-e236-466b-9ec9-e4f1dea4fd5e\" /\u003e\n\u003cimg width=\"1382\" height=\"847\" alt=\"image\" src=\"https://github.com/user-attachments/assets/01820d3c-c374-402a-8d72-6ea75dbd92c2\" /\u003e\n\n### Impact\nArbitrary JavaScript execution in the user\u0027s session context if the SVG is loaded directly. It also prevents using legitimate characters like \u003c or \u003e in icon text.\n\n### Note\nTested version:\n\u003cimg width=\"1368\" height=\"699\" alt=\"image\" src=\"https://github.com/user-attachments/assets/a7466b8f-a88b-461d-8d9e-7178af7ab076\" /\u003e",
  "id": "GHSA-w836-5gpm-7r93",
  "modified": "2026-01-21T01:00:44Z",
  "published": "2026-01-21T01:00:44Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23847"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/issues/16844"
    },
    {
      "type": "WEB",
      "url": "https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/siyuan-note/siyuan"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "SiYuan has a Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon"
}

CVE-2026-23847 (GCVE-0-2026-23847)

Vulnerability from cvelistv5 – Published: 2026-01-19 19:46 – Updated: 2026-01-20 14:37

Title

SiYuan Vulnerable to Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon

Summary

SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG <text> tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript. Version 3.5.4 patches the issue.]

Severity ?

2.1 (Low)


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

CWE

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

Assigner

GitHub_M

References

URL

Tags

	https://github.com/siyuan-note/siyuan/security/ad…	x_refsource_CONFIRM
	https://github.com/siyuan-note/siyuan/issues/16844	x_refsource_MISC
	https://github.com/siyuan-note/siyuan/commit/5c0c…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	siyuan-note	siyuan	Affected: < 3.5.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-23847",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-20T14:37:01.409541Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-20T14:37:42.649Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "siyuan",
          "vendor": "siyuan-note",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.5.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SiYuan is a personal knowledge management system. Versions prior to 3.5.4 are vulnerable to reflected cross-site scripting in /api/icon/getDynamicIcon due to unsanitized SVG input. The endpoint generates SVG images for text icons (type=8). The content query parameter is inserted directly into the SVG \u003ctext\u003e tag without XML escaping. Since the response Content-Type is image/svg+xml, injecting unescaped tags allows breaking the XML structure and executing JavaScript. Version 3.5.4 patches the issue.]"
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 2.1,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "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": "2026-01-19T19:46:08.980Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/siyuan-note/siyuan/security/advisories/GHSA-w836-5gpm-7r93"
        },
        {
          "name": "https://github.com/siyuan-note/siyuan/issues/16844",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/siyuan-note/siyuan/issues/16844"
        },
        {
          "name": "https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/siyuan-note/siyuan/commit/5c0cc375b47567e15edd2119066b09bb0aa18777"
        }
      ],
      "source": {
        "advisory": "GHSA-w836-5gpm-7r93",
        "discovery": "UNKNOWN"
      },
      "title": "SiYuan Vulnerable to Reflected Cross-Site Scripting (XSS) via /api/icon/getDynamicIcon"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-23847",
    "datePublished": "2026-01-19T19:46:08.980Z",
    "dateReserved": "2026-01-16T15:46:40.843Z",
    "dateUpdated": "2026-01-20T14:37:42.649Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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-W836-5GPM-7R93

Summary

Details

PoC

Impact

Note

CVE-2026-23847 (GCVE-0-2026-23847)

Tags

Sightings

Nomenclature