Security readout for executives and security teams
Plain-English summary
This CVE describes a denial-of-service risk in scniro-validator v1.0.1. An attacker may be able to make an application spend excessive processing time while checking maliciously formed invalid email input. The sources do not provide severity scoring, affected CPEs, a patch version, or evidence of exploitation.
Executive priority
Handle as a targeted availability risk rather than a confirmed breach risk. Priority depends on whether scniro-validator v1.0.1 protects public-facing email fields. Confirm exposure first, then replace or mitigate if present.
Technical view
CVE-2021-40901 is reported as a Regular Expression Denial of Service issue in scniro-validator v1.0.1 during email validation. The likely failure mode is excessive regex evaluation on crafted invalid email strings. The record provides limited metadata and no CVSS, CWE, exploit status, or vendor remediation details.
Likely exposure
Exposure is most likely in applications that directly or transitively use scniro-validator v1.0.1 to validate untrusted email input, especially public forms or APIs. The provided CVE data lists no CPEs or broader product inventory.
Exploitation context
The source bundle does not show CISA KEV listing, active exploitation, public exploit status, or exploitation volume. Treat this as a potential availability issue until local dependency use and input paths are confirmed.
Researcher notes
Evidence is sparse. The CVE description names ReDoS in scniro-validator v1.0.1 for crafted invalid emails, but the bundle lacks CVSS, CWE, CPEs, patch references, and exploit intelligence. Avoid assuming broader affected versions without upstream confirmation.
Mitigation direction
- Inventory applications for scniro-validator v1.0.1 dependency use.
- Check upstream project or vendor guidance for a fixed version or replacement.
- Apply conservative email field length limits before validation.
- Use request timeouts and rate limits on public input endpoints.
- Prioritize exposed authentication, signup, and contact forms.
Validation and detection
- Search dependency manifests and lockfiles for scniro-validator v1.0.1.
- Identify routes or services that validate untrusted email input.
- Review validator behavior in a safe test environment for CPU spikes.
- Confirm compensating controls on public forms and APIs.
- Document whether the dependency is direct, transitive, or unused.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-40901 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/yetingli/SaveResults/blob/main/js/scniro-validator.jsCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.