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CVE-2026-66751 (GCVE-0-2026-66751)

Vulnerability from nvd – Published: 2026-07-28 15:36 – Updated: 2026-07-28 17:23 X_Open Source Unsupported When Assigned

Title

Let's Chat 0.3.0 - 0.4.8 Improper Authorization via DELETE /rooms/:room

Summary

Let's Chat 0.3.0 through 0.4.8 contains an improper authorization vulnerability that allows any authenticated user to archive any room on the server by sending a DELETE request to the rooms handler without ownership verification. Attackers can enumerate room IDs via the rooms listing endpoint and permanently archive private or password-protected rooms they cannot access, with no application-level recovery path requiring direct database intervention to restore.

Severity

5.3 (Medium)


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

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/theopaid/Insufficient-Access-C…	technical-descriptionexploit
https://www.vulncheck.com/advisories/let-s-chat-i…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sdelements	lets-chat	Affected: 0.3.0 , ≤ 0.4.8 (semver) Affected: 5b5f46f92696955c27864dbca8b33b5b6a39a502 , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git)

Date Public

2026-07-26 00:00

Credits

Theodosis Paidakis

Show details on NVD website

JSON

To clipboard

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CVE-2026-66750 (GCVE-0-2026-66750)

Vulnerability from nvd – Published: 2026-07-28 15:33 – Updated: 2026-07-28 17:07 X_Open Source Unsupported When Assigned

Title

Let's Chat 0.3.0 - 0.4.8 Broken Access Control File Disclosure via GET /files route

Summary

Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a member of by exploiting missing room membership checks in the file retrieval route. Attackers can enumerate adjacent MongoDB ObjectIds derived from a known file ID to recover files uploaded by other users, as the GET /files/:id/:name route in app/controllers/files.js only enforces login authentication without consulting room membership or the Room.canJoin check.

Severity

5.3 (Medium)


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

4.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/theopaid/Insufficient-Access-C…	technical-descriptionexploit
https://www.vulncheck.com/advisories/let-s-chat-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sdelements	lets-chat	Affected: 0.3.0 , ≤ 0.4.8 (semver) Affected: 55e8833974c83559ed2cbc12bc15febeb2466254 , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git)

Date Public

2026-07-26 00:00

Credits

Theodosis Paidakis

Show details on NVD website

JSON

To clipboard

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CVE-2026-66749 (GCVE-0-2026-66749)

Vulnerability from nvd – Published: 2026-07-28 15:30 – Updated: 2026-07-28 16:43 X_Open Source Unsupported When Assigned

Title

Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup

Summary

Let's Chat 0.4.0 through 0.4.8 contains a null dereference vulnerability that allows authenticated attackers to crash the server by supplying a valid 24-character hex string room parameter that matches no document in the database. Attackers can send a crafted GET /messages request causing an uncaught TypeError in an asynchronous Mongoose callback that terminates the Node.js server process, with the same defect reachable through multiple code paths including the socket.io interface.

Severity

7.1 (High)


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

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/theopaid/Unchecked-Room-Lookup…	technical-descriptionexploit
https://www.vulncheck.com/advisories/let-s-chat-d…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sdelements	lets-chat	Affected: 0.4.0 , ≤ 0.4.8 (semver) Affected: 84981a6d2534445c00ea4e095c934e46943c0b1d , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git)

Date Public

2026-07-26 00:00

Credits

Theodosis Paidakis

Show details on NVD website

JSON

To clipboard

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CVE-2026-66751 (GCVE-0-2026-66751)

Vulnerability from cvelistv5 – Published: 2026-07-28 15:36 – Updated: 2026-07-28 17:23 X_Open Source Unsupported When Assigned

Title

Let's Chat 0.3.0 - 0.4.8 Improper Authorization via DELETE /rooms/:room

Summary

Let's Chat 0.3.0 through 0.4.8 contains an improper authorization vulnerability that allows any authenticated user to archive any room on the server by sending a DELETE request to the rooms handler without ownership verification. Attackers can enumerate room IDs via the rooms listing endpoint and permanently archive private or password-protected rooms they cannot access, with no application-level recovery path requiring direct database intervention to restore.

Severity

5.3 (Medium)


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

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/theopaid/Insufficient-Access-C…	technical-descriptionexploit
https://www.vulncheck.com/advisories/let-s-chat-i…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sdelements	lets-chat	Affected: 0.3.0 , ≤ 0.4.8 (semver) Affected: 5b5f46f92696955c27864dbca8b33b5b6a39a502 , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git)

Date Public

2026-07-26 00:00

Credits

Theodosis Paidakis

Show details on NVD website

JSON

To clipboard

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CVE-2026-66750 (GCVE-0-2026-66750)

Vulnerability from cvelistv5 – Published: 2026-07-28 15:33 – Updated: 2026-07-28 17:07 X_Open Source Unsupported When Assigned

Title

Let's Chat 0.3.0 - 0.4.8 Broken Access Control File Disclosure via GET /files route

Summary

Let's Chat 0.3.0 through 0.4.8 contains a broken access control vulnerability that allows authenticated attackers to download file attachments from private and password-protected rooms they are not a member of by exploiting missing room membership checks in the file retrieval route. Attackers can enumerate adjacent MongoDB ObjectIds derived from a known file ID to recover files uploaded by other users, as the GET /files/:id/:name route in app/controllers/files.js only enforces login authentication without consulting room membership or the Room.canJoin check.

Severity

5.3 (Medium)


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

4.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/theopaid/Insufficient-Access-C…	technical-descriptionexploit
https://www.vulncheck.com/advisories/let-s-chat-b…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sdelements	lets-chat	Affected: 0.3.0 , ≤ 0.4.8 (semver) Affected: 55e8833974c83559ed2cbc12bc15febeb2466254 , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git)

Date Public

2026-07-26 00:00

Credits

Theodosis Paidakis

Show details on NVD website

JSON

To clipboard

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CVE-2026-66749 (GCVE-0-2026-66749)

Vulnerability from cvelistv5 – Published: 2026-07-28 15:30 – Updated: 2026-07-28 16:43 X_Open Source Unsupported When Assigned

Title

Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup

Summary

Let's Chat 0.4.0 through 0.4.8 contains a null dereference vulnerability that allows authenticated attackers to crash the server by supplying a valid 24-character hex string room parameter that matches no document in the database. Attackers can send a crafted GET /messages request causing an uncaught TypeError in an asynchronous Mongoose callback that terminates the Node.js server process, with the same defect reachable through multiple code paths including the socket.io interface.

Severity

7.1 (High)


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

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-476 - NULL Pointer Dereference

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/theopaid/Unchecked-Room-Lookup…	technical-descriptionexploit
https://www.vulncheck.com/advisories/let-s-chat-d…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sdelements	lets-chat	Affected: 0.4.0 , ≤ 0.4.8 (semver) Affected: 84981a6d2534445c00ea4e095c934e46943c0b1d , ≤ 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c (git)

Date Public

2026-07-26 00:00

Credits

Theodosis Paidakis

Show details on NVD website

JSON

To clipboard

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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-66749",
    "datePublished": "2026-07-28T15:30:46.773Z",
    "dateReserved": "2026-07-27T16:27:47.648Z",
    "dateUpdated": "2026-07-28T16:43:43.566Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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6 vulnerabilities by sdelements

CVE-2026-66751 (GCVE-0-2026-66751)

CVE-2026-66750 (GCVE-0-2026-66750)

CVE-2026-66749 (GCVE-0-2026-66749)

CVE-2026-66751 (GCVE-0-2026-66751)

CVE-2026-66750 (GCVE-0-2026-66750)

CVE-2026-66749 (GCVE-0-2026-66749)

Find a vulnerability

Search criteria ⓘ Use this form to refine search results. Full-text search supports keyword queries with ranking and filtering. You can combine vendor, product, and sources to narrow results. Enable “Apply ordering” to sort by date instead of relevance.

6 vulnerabilities by sdelements

CVE-2026-66751 (GCVE-0-2026-66751)

CVE-2026-66750 (GCVE-0-2026-66750)

CVE-2026-66749 (GCVE-0-2026-66749)

CVE-2026-66751 (GCVE-0-2026-66751)

CVE-2026-66750 (GCVE-0-2026-66750)

CVE-2026-66749 (GCVE-0-2026-66749)

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.