CVE-2023-33965
Brook's tproxy server is vulnerable to a drive-by command injection.
CVE-2023-33965 is a critical vulnerability (CVSS 9.7) in Txthinking Brook, published June 1, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.58%, the 75th percentile. Fixed in github.com/txthinking/brook 20230606.
Brook is a cross-platform programmable network tool. The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution. A patch is available in version 20230606.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Brook's tproxy server is vulnerable to a drive-by command injection.
Brook is a cross-platform programmable network tool. The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution. A patch is available in version 20230606.
- Record
CVE-2023-33965- CVSS 3.1
- 9.7 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
EUVDEUVD-2023-1890
Brook is a cross-platform programmable network tool. The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution. A patch is available in version 20230606.
- Record
EUVD-2023-1890- CVSS 3.1
- 9.7 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vfrj-fv6p-3cpf
Brook's tproxy server is vulnerable to a drive-by command injection.
The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution.
- Record
GHSA-vfrj-fv6p-3cpf- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
NVD
Brook is a cross-platform programmable network tool. The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution. A patch is available in version 20230606.
- Record
CVE-2023-33965- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
OSV
Brook's tproxy server is vulnerable to a drive-by command injection.
Brook is a cross-platform programmable network tool. The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution. A patch is available in version 20230606.
- Record
CVE-2023-33965- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
OSVGHSA-vfrj-fv6p-3cpf
Brook's tproxy server is vulnerable to a drive-by command injection.
The tproxy server is vulnerable to a drive-by command injection. An attacker may fool a victim into visiting a malicious web page which will trigger requests to the local tproxy service leading to remote code execution.
- Record
GHSA-vfrj-fv6p-3cpf- CVSS 3.1
- 9.6 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- CWE-78
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/txthinking/brookGo |
before 20230606 | 20230606 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases, published | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
github.com/txthinking/brook/security/advisories/GHSA-vfrj-fv6p-3cpf
nvd.nist.gov/vuln/detail/CVE-2023-33965