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

Vulnerability from nvd – Published: 2026-08-28 07:08 – Updated: 2026-08-28 11:03

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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 11:02 UTC

CWE

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

Assigner

synology mitre root

References

1 reference

URL	Tags
https://www.synology.com/en-global/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Synology	Synology Chat Server	Affected: * , < 2.4.5-22148 (semver)

Credits

Warisse Valentin (Aytio)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
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              "content": {
                "id": "CVE-2026-9548",
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-28T11:02:23.550934Z",
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            "attackComplexity": "LOW",
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CVE-2026-9491 (GCVE-0-2026-9491)

Vulnerability from nvd – Published: 2026-08-28 07:07 – Updated: 2026-08-28 11:03

Summary

A server-ide request forgery (SSRF) vulnerability in webhook in Synology Chat Server before 2.4.5-22148 allows remote authenticated users to obtain non-sensitive information.

Severity

4.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 11:03 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

synology mitre root

References

1 reference

URL	Tags
https://www.synology.com/en-global/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Synology	Synology Chat Server	Affected: * , < 2.4.5-22148 (semver)

Credits

Lam Jun Rong and Javier Koh, Cyber Specialists of the Digital and Intelligence Service (DIS) working with the Centre for Strategic Infocomm Technologies (CSIT) and Dr Joseph Teo, CSIT

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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CVE-2026-40541 (GCVE-0-2026-40541)

Vulnerability from nvd – Published: 2026-08-28 07:07 – Updated: 2026-08-28 11:44

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 arbitrary files and conduct denial-of-service attacks in DSM.

Severity

9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 11:31 UTC

CWE

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

Assigner

synology mitre root

References

1 reference

URL	Tags
https://www.synology.com/en-global/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Synology	Synology Chat Server	Affected: * , < 2.4.5-22148 (semver)

Credits

Lam Jun Rong and Javier Koh, Cyber Specialists of the Digital and Intelligence Service (DIS) working with the Centre for Strategic Infocomm Technologies (CSIT) and Dr Joseph Teo, CSIT

Show details on NVD website

JSON

To clipboard

{
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    "adp": [
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        "metrics": [
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                "id": "CVE-2026-40541",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
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            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
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CVE-2026-9548 (GCVE-0-2026-9548)

Vulnerability from cvelistv5 – Published: 2026-08-28 07:08 – Updated: 2026-08-28 11:03

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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 11:02 UTC

CWE

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

Assigner

synology mitre root

References

1 reference

URL	Tags
https://www.synology.com/en-global/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Synology	Synology Chat Server	Affected: * , < 2.4.5-22148 (semver)

Credits

Warisse Valentin (Aytio)

Show details on NVD website

JSON

To clipboard

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CVE-2026-9491 (GCVE-0-2026-9491)

Vulnerability from cvelistv5 – Published: 2026-08-28 07:07 – Updated: 2026-08-28 11:03

Summary

A server-ide request forgery (SSRF) vulnerability in webhook in Synology Chat Server before 2.4.5-22148 allows remote authenticated users to obtain non-sensitive information.

Severity

4.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 11:03 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

synology mitre root

References

1 reference

URL	Tags
https://www.synology.com/en-global/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Synology	Synology Chat Server	Affected: * , < 2.4.5-22148 (semver)

Credits

Lam Jun Rong and Javier Koh, Cyber Specialists of the Digital and Intelligence Service (DIS) working with the Centre for Strategic Infocomm Technologies (CSIT) and Dr Joseph Teo, CSIT

Show details on NVD website

JSON

To clipboard

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            "scope": "UNCHANGED",
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          "descriptions": [
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              "cweId": "CWE-918",
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T07:07:57.240Z",
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      "references": [
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          "name": "Synology-SA-26:10 Synology Chat Server",
          "tags": [
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    "dateReserved": "2026-05-25T02:03:55.583Z",
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CVE-2026-40541 (GCVE-0-2026-40541)

Vulnerability from cvelistv5 – Published: 2026-08-28 07:07 – Updated: 2026-08-28 11:44

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 arbitrary files and conduct denial-of-service attacks in DSM.

Severity

9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 11:31 UTC

CWE

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

Assigner

synology mitre root

References

1 reference

URL	Tags
https://www.synology.com/en-global/security/advis…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Synology	Synology Chat Server	Affected: * , < 2.4.5-22148 (semver)

Credits

Lam Jun Rong and Javier Koh, Cyber Specialists of the Digital and Intelligence Service (DIS) working with the Centre for Strategic Infocomm Technologies (CSIT) and Dr Joseph Teo, CSIT

Show details on NVD website

JSON

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6 vulnerabilities found for Synology Chat Server by Synology

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

CVE-2026-9491 (GCVE-0-2026-9491)

CVE-2026-40541 (GCVE-0-2026-40541)

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

CVE-2026-9491 (GCVE-0-2026-9491)

CVE-2026-40541 (GCVE-0-2026-40541)