Security Resilience

CVE-2024-1884

SSRF in Papercut Mf ≤ 20.1.10

Published
14 March 2024
Modified
17 June 2026
Patch / advisory
CVSS Score v3.1 6.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS Score 0.38 99th percentile
Risk Priority 69 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2024-1884 is a medium-severity SSRF (CWE-918) vulnerability in Papercut Papercut Mf. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique LSASS Memory (T1003.001); ranked in the top 1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-4 (Information Flow Enforcement) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

This CVE describes a server-side request forgery (SSRF) flaw, tracked as CWE-918, in the PaperCut NG/MF server-side module. The vulnerability permits an unauthenticated remote attacker to cause the application to issue HTTP requests to arbitrary attacker-chosen domains, carrying a CVSS 3.1 score of 6.5.

An attacker with network access can exploit the issue without credentials or user interaction, achieving limited disclosure of internal resources and limited ability to interact with internal or external systems reachable by the PaperCut server.

PaperCut’s March 2024 security bulletin provides official guidance and remediation steps for affected customers.

EPSS for the CVE rose from a low baseline to a peak of 0.4038 on 2025-12-11 before receding, indicating a clear post-disclosure increase in exploitation interest.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

This is a Server-Side Request Forgery (SSRF) vulnerability in the PaperCut NG/MF server-side module that allows an attacker to induce the server-side application to make HTTP requests to an arbitrary domain of the attacker's choosing.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.001 LSASS Memory Credential Access
Adversaries may attempt to access credential material stored in the process memory of the Local Security Authority Subsystem Service (LSASS).
T1003.005 Cached Domain Credentials Credential Access
Adversaries may attempt to access cached domain credentials used to allow authentication to occur in the event a domain controller is unavailable.
T1021.001 Remote Desktop Protocol Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
T1021.002 SMB/Windows Admin Shares Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
T1021.004 SSH Lateral Movement
Adversaries may use [Valid Accounts](https://attack.
T1021.007 Cloud Services Lateral Movement
Adversaries may log into accessible cloud services within a compromised environment using [Valid Accounts](https://attack.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

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CVE-2026-47938Same product: Linux Linux Kernel

Affected Assets

papercut
papercut mf
≤ 20.1.10 · 21.0.0 — 21.2.14 · 22.0.0 — 22.1.5
papercut
papercut ng
≤ 20.1.10 · 21.0.0 — 21.2.14 · 22.0.0 — 22.1.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.3.6
  • V1.5.3
  • V5.3.2
  • V10.4.7

Mitigating Controls (NIST 800-53 r5) AI

Information flow enforcement can restrict which destinations the server is allowed to contact on behalf of users.

Input validation directly stops untrusted URLs from being accepted and fetched without destination checks.

Boundary protection limits the network reach of server-initiated requests even if SSRF occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

DE.CM-09 partial match
blocks

Runtime monitoring of web applications and services can detect anomalous outbound requests indicative of SSRF.

ID.RA-01 partial match
blocks

Vulnerability identification processes can discover and record SSRF flaws in web applications.

PR.IR-01 partial match
blocks

Network segmentation and egress controls can limit the damage from successful SSRF requests.

PR.PS-06 partial match
blocks

Secure development practices directly include input validation and destination allow-listing that prevent SSRF.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

removes
removes
removes
removes

References