CVE-2026-4794 Multiple cross-site scripting (XSS) vulnerabilities in PaperCut NG/MF

What is CVE-2026-4794?

CVE-2026-4794 is a low-severity cross-site scripting vulnerability in PaperCut NG/MF, published on 31 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Multiple cross-site scripting (XSS) vulnerabilities in PaperCut NG/MF before 25.0.10 allow authenticated administrator users to inject arbitrary web script or HTML code via different UI fields. This could be used to compromise other admininistrator's sessions or perform unauthorized actions via the administrator's authenticated context (e.g. requires an active login session).

Weakness: CWE-79

Which versions are affected by CVE-2026-4794?

It affects 2 products.

Products include Papercut Papercut Mf, Papercut Papercut Ng.

How do I fix CVE-2026-4794?

No fix has been published for CVE-2026-4794 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-4794 being exploited?

There is no known exploitation of CVE-2026-4794 in the wild and no public exploit code.

Other vulnerabilities in PaperCut NG/MF

• CVE-2023-27350 PaperCut MF/NG Improper Access Control Exploited Critical 9.8
• CVE-2026-82078 PaperCut NG/MF Unsafe Reflection Exploited Critical 9.4
• CVE-2026-81578 PaperCut NG/MF Missing Authentication for Critical Function Exploited High 8.8
• CVE-2023-2533 PaperCut NG/MF Cross-Site Request Forgery (CSRF) Exploited High 8.4
• CVE-2023-27351 PaperCut NG/MF Improper Authentication Exploited High 8.2

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-m6wx-rxrp-cc9p.