CVE-2022-41956
Autolab is vulnerable to file disclosure via remote handin feature
Autolab is a course management service, initially developed by a team of students at Carnegie Mellon University, that enables instructors to offer autograded programming assignments to their students over the Web. A file disclosure vulnerability was discovered in Autolab's remote handin feature, whereby users are able to hand-in assignments using paths outside their submission directory. Users can then view the submission to view the file's contents. The vulnerability has been patched in version 2.10.0. As a workaround, ensure that the field for the remote handin feature is empty (Edit Assessment > Advanced > Remote handin path), and that you are not running Autolab as root (or any user that has write access to /). Alternatively, disable the remote handin feature if it is unneeded by replacing the body of local_submit in app/controllers/assessment/handin.rb with render(plain: "Feature disabled", status: :bad_request) && return.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
6.5
Autolab is vulnerable to file disclosure via remote handin feature
Autolab is a course management service, initially developed by a team of students at Carnegie Mellon University, that enables instructors to offer autograded programming assignments to their students over the Web. A file disclosure vulnerability was discovered in Autolab's remote handin feature, whereby users are able to hand-in assignments using paths outside their submission directory. Users can then view the submission to view the file's contents. The vulnerability has been patched in version 2.10.0. As a workaround, ensure that the field for the remote handin feature is empty (Edit Assessment > Advanced > Remote handin path), and that you are not running Autolab as root (or any user that has write access to /). Alternatively, disable the remote handin feature if it is unneeded by replacing the body of local_submit in app/controllers/assessment/handin.rb with render(plain: "Feature disabled", status: :bad_request) && return.
- Record
CVE-2022-41956- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2022-45063
6.5
Autolab is a course management service, initially developed by a team of students at Carnegie Mellon University, that enables instructors to offer autograded programming assignments to their students over the Web. A file disclosure vulnerability was discovered in Autolab's remote handin feature, whereby users are able to hand-in assignments using paths outside their submission directory. Users can then view the submission to view the file's contents. The vulnerability has been patched in version 2.10.0. As a workaround, ensure that the field for the remote handin feature is empty (Edit Assessment > Advanced > Remote handin path), and that you are not running Autolab as root (or any user that has write access to /). Alternatively, disable the remote handin feature if it is unneeded by replacing the body of local_submit in app/controllers/assessment/handin.rb with render(plain: "Feature disabled", status: :bad_request) && return.
- Record
EUVD-2022-45063- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
NVD
6.5
Autolab is a course management service, initially developed by a team of students at Carnegie Mellon University, that enables instructors to offer autograded programming assignments to their students over the Web. A file disclosure vulnerability was discovered in Autolab's remote handin feature, whereby users are able to hand-in assignments using paths outside their submission directory. Users can then view the submission to view the file's contents. The vulnerability has been patched in version 2.10.0. As a workaround, ensure that the field for the remote handin feature is empty (Edit Assessment > Advanced > Remote handin path), and that you are not running Autolab as root (or any user that has write access to /). Alternatively, disable the remote handin feature if it is unneeded by replacing the body of local_submit in app/controllers/assessment/handin.rb with render(plain: "Feature disabled", status: :bad_request) && return.
- Record
CVE-2022-41956- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
6.5
Autolab is vulnerable to file disclosure via remote handin feature
Autolab is a course management service, initially developed by a team of students at Carnegie Mellon University, that enables instructors to offer autograded programming assignments to their students over the Web. A file disclosure vulnerability was discovered in Autolab's remote handin feature, whereby users are able to hand-in assignments using paths outside their submission directory. Users can then view the submission to view the file's contents. The vulnerability has been patched in version 2.10.0. As a workaround, ensure that the field for the remote handin feature is empty (Edit Assessment > Advanced > Remote handin path), and that you are not running Autolab as root (or any user that has write access to /). Alternatively, disable the remote handin feature if it is unneeded by replacing the body of local_submit in app/controllers/assessment/handin.rb with render(plain: "Feature disabled", status: :bad_request) && return.
- Record
CVE-2022-41956- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2022-41956 is a medium vulnerability (CVSS 6.5) in Autolab, published January 14, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.85%, the 79th percentile. No source names a fixed version.
References
github.com/autolab/Autolab/security/advisories/GHSA-g7x7-mgrv-f24x
securitylab.github.com/advisories/GHSL-2022-100_Autolab
stackhawk.com/blog/rails-path-traversal-guide-examples-and-prevention
github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41956.json
nvd.nist.gov/vuln/detail/CVE-2022-41956