Paste Script has improper group memberships permissions

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

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

EPSS

• CVE-2012-0878: 4.03% estimated exploitation activity in the next 30 days; percentile 90.60 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Paste Script 1.7.5 and earlier does not properly set group memberships during execution with root privileges, which might allow remote attackers to bypass intended file-access restrictions by leveraging a web application that uses the local filesystem.

Published by the source

17 May 2022, 05:12 UTC

Last modified by the source

13 Jul 2026, 16:43 UTC

Source last checked

26 Oct 2026, 13:21 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-27px-qpmj-qg38

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-27px-qpmj-qg38

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# Patch Next advisory brief: CVE-2012-0878

Advisory: Paste Script has improper group memberships permissions
IDs: CVE-2012-0878, GHSA-27px-qpmj-qg38
Record: https://patchnext.com/advisories/cve-2012-0878 (revision 3, source checked 26 Oct 2026, 13:21 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: pastescript 2.0.1; paste 1.7.5.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI pastescript: affected < 2.0.1; fixed in 2.0.1
- PyPI paste: affected < 1.7.5.1; fixed in 1.7.5.1

## Suggested inspection (read-only)
- `python -m pip show pastescript`: prints the installed version. Run with the environment that serves production active.
- `python -m pip show paste`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on pastescript, paste.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-27px-qpmj-qg38 (OSV record GHSA-27px-qpmj-qg38 lists affected ranges: PyPI pastescript >=0 =0 <1.7.5.1 (fixed))
- Verified: https://github.com/advisories/GHSA-27px-qpmj-qg38 (GitHub-reviewed advisory GHSA-27px-qpmj-qg38 lists affected ranges: PyPI pastescript >=0 =0 <1.7.5.1)

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