PaperCut NG, PaperCut MF: Improper Neutralization of Equivalent Special Elements
CVE-2024-1882 is a high-severity improper neutralization of equivalent special elements vulnerability in PaperCut NG, PaperCut MF from PaperCut, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. The record lists versions 23.0.7, 22.1.5, 21.2.14 as the first without the flaw, so updating PaperCut NG, PaperCut MF to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.41% chance of exploitation within 30 days, higher than 73% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update PaperCut NG, PaperCut MF to 23.0.7 or 22.1.5 or 21.2.14 or 20.1.10, whichever matches your release line, or a later version.
- Update papercut_ng to 23.0.7 or 22.1.5 or 21.2.14 or 20.1.10, whichever matches your release line, or a later version.
- Update papercut_mf to 23.0.7 or 22.1.5 or 21.2.14 or 20.1.10, whichever matches your release line, or a later version.
- Read the advisory on papercut.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| PaperCut | PaperCut NG, PaperCut MF | before 23.0.7; before 22.1.5; before 21.2.14; before 20.1.10 | 23.0.7, 22.1.5, 21.2.14, 20.1.10 |
| Papercut | papercut_ng | before 23.0.7; before 22.1.5; before 21.2.14; before 20.1.10 | 23.0.7, 22.1.5, 21.2.14, 20.1.10 |
| Papercut | papercut_mf | before 23.0.7; before 22.1.5; before 21.2.14; before 20.1.10 | 23.0.7, 22.1.5, 21.2.14, 20.1.10 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | CNA |
| CVSS 3.1 | 7.2 | High | NVD |
Official description
This vulnerability allows an already authenticated admin user to create a malicious payload that could be leveraged for remote code execution on the server hosting the PaperCut NG/MF application server.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Equivalent Special Elements
The product correctly neutralizes certain special elements, but it improperly neutralizes equivalent special elements.
How developers prevent this class of flaw
- Programming languages and supporting technologies might be chosen which are not subject to these issues.
- Utilize an appropriate mix of allowlist and denylist parsing to filter equivalent special element syntax from all input.
More Improper Neutralization of Equivalent Special Elements vulnerabilities (CWE-76)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in PaperCut NG, PaperCut MF
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.2 High severity
- 9.8 Critical severity
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