# CVE-2021-44908: Prototype Pollution in Sails.js

> Prototype pollution in Sails.js allows attackers to manipulate object prototypes, potentially leading to code execution or privilege escalation.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Mar 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-8v3j-jfg3-v3fv

## What is CVE-2021-44908?

CVE-2021-44908 is a critical vulnerability in n/a, published on 17 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SailsJS Sails.js <=1.4.0 is vulnerable to Prototype Pollution via controller/load-action-modules.js, function loadActionModules().

Weakness: CWE-1321 (Improperly Controlled Modification of Object Prototype Attributes)

## Which versions are affected by CVE-2021-44908?

2 open source packages ship an affected version, including sails. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `sails` | npm | All versions to 1.5.2 | None |
| `sails` | npm | All versions to 1.5.2 | None |

Products: Sailsjs Sails.

## How do I fix CVE-2021-44908?

No fix has been published for CVE-2021-44908 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-44908 being exploited?

There is no known exploitation of CVE-2021-44908 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-38504](https://insights.sbomify.com/CVE-2023-38504/): Sails DoS vulnerability for apps with sockets enabled (high 7.5)
- [CVE-2018-21036](https://insights.sbomify.com/CVE-2018-21036/): Improper Input Validation in sails-hook-sockets (high 7.5)
- [CVE-2016-10549](https://insights.sbomify.com/CVE-2016-10549/): Sails before 0.12.7 vulnerable to Broken CORS (medium 4.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-44908 and fix it if it is affected.

What it is: CVE-2021-44908 is a critical vulnerability in n/a, published on 17 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-44908 in the wild and no public exploit code.

Affected packages and fixed versions:
- sails (npm): affected all versions up to 1.5.2; no fix listed
- sails (npm): affected all versions up to 1.5.2; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-44908/ (Markdown: https://insights.sbomify.com/CVE-2021-44908/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-44908
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-44908
- OSV: https://osv.dev/vulnerability/CVE-2021-44908

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-44908/
Summaries are generated and may contain mistakes; the official description above is the record.