microweber/microweber: Improper Neutralization of CRLF Sequences
CVE-2022-0666 is a high-severity improper neutralization of CRLF sequences vulnerability in microweber/microweber from Microweber, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 1.2.11 as the first without the flaw, so updating microweber/microweber to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 44.3% chance of exploitation within 30 days, which is in the top 1.22% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update microweber/microweber to 1.2.11 or a later version.
- Update Microweber to 1.2.11 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Microweber | microweber/microweber | before 1.2.11 | 1.2.11 |
| Microweber | Microweber | before 1.2.11 | 1.2.11 |
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
- NoneNo account or login is needed.
- 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.0 | 7.6 | High | CNA (huntr.dev) |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
CRLF Injection leads to Stack Trace Exposure due to lack of filtering at https://demo.microweber.org/ in Packagist microweber/microweber prior to 1.2.11.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of CRLF Sequences
The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.
How developers prevent this class of flaw
- Appropriately filter or quote CRLF sequences in user-controlled input.
More Improper Neutralization of CRLF Sequences vulnerabilities (CWE-93)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- github.com/microweber/microweber/commit/f0e338f1b7dc5ec9d99231f4ed3fa6245a5eb128Third Party Advisory
- huntr.dev/bounties/7215afc7-9133-4749-8e8e-0569317dbd55Exploit, Third Party Advisory
Other vulnerabilities in microweber/microweber
- 8.8 High severity
- 7.5 High severity
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