# CVE-2021-3965: Missing authorization in HP DesignJet Printer

> Unauthenticated attackers can view and download print job previews on HP DesignJet printers due to missing authorization checks.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Jan 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-pf8r-282h-75wr

## What is CVE-2021-3965?

CVE-2021-3965 is a high-severity missing authorization vulnerability in HP DesignJet Printer, published on 14 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Certain HP DesignJet products may be vulnerable to unauthenticated HTTP requests which allow viewing and downloading of print job previews.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2021-3965?

It affects 27 products.


Products: Hp Designjet T1530 L2y23a Firmware, Hp Designjet T1530 L2y24a Firmware, Hp Designjet T1530 L2y24b Firmware, Hp Designjet T2530 L2y25a Firmware, Hp Designjet T2530 L2y26a Firmware, Hp Designjet T2530 L2y26b Firmware, Hp Designjet T3500 B9e24a Firmware, Hp Designjet T3500 B9e24b Firmware, Hp Designjet T3500 B9e25a Firmware, Hp Designjet T920 Cr354a Firmware, Hp Designjet T920 Cr355a Firmware, Hp Designjet T920 Cr355b Firmware, Hp Designjet T930 L2y21a Firmware, Hp Designjet T930 L2y21b Firmware, Hp Designjet T930 L2y22a Firmware, Hp Designjet T930 L2y22b Firmware, Hp Designjet Z6600 F2s71a Firmware, Hp Designjet Z6600 F2s71ar Firmware, Hp Designjet Z6610 2qu13a Firmware, Hp Designjet Z6610 2qu13b Firmware and 7 more.

## How do I fix CVE-2021-3965?

No fix has been published for CVE-2021-3965 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-3965 being exploited?

There is no known exploitation of CVE-2021-3965 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-3965 and fix it if it is affected.

What it is: CVE-2021-3965 is a high-severity missing authorization vulnerability in HP DesignJet Printer, published on 14 Jan 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-2021-3965 in the wild and no public exploit code.

Affected product: HP DesignJet Printer. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2021-3965/ (Markdown: https://insights.sbomify.com/CVE-2021-3965/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3965
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3965
- OSV: https://osv.dev/vulnerability/CVE-2021-3965

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-3965/
Summaries are generated and may contain mistakes; the official description above is the record.