CVE-2026-9548 (GCVE-0-2026-9548)

Vulnerability from cvelistv5 – Published: 2026-08-28 07:08 – Updated: 2026-08-28 07:08
VLAI
Summary
An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write restricted files and conduct limited denial-of-service attacks in DSM.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version CPE status
Synology Synology Chat Server Affected: * , < 2.4.5-22148 (semver)
guessed Create a notification for this product.
Credits
Warisse Valentin (Aytio)
Show details on NVD website
To clipboard 

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      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2026-08-28T07:08:51.584Z",
        "orgId": "db201096-a0cc-46c7-9a55-61d9e221bf01",
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    "dateReserved": "2026-05-26T07:01:48.490Z",
    "dateUpdated": "2026-08-28T07:08:51.584Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.