Security readout for executives and security teams
Plain-English summary
CVE-2018-10193 describes a browser hang issue in LastPass through version 4.15.0. A specially crafted HTML page with many input fields can cause LastPass extension processing to consume excessive resources. The described impact is denial of service, not credential theft or code execution.
Executive priority
Handle through normal endpoint hygiene unless the organization still runs old LastPass extensions at scale. The business risk is disruption to browser usability, not confirmed compromise of passwords or systems based on the provided sources.
Technical view
The CVE attributes the issue to onloadwff.js resource consumption growing with the number of INPUT elements in an HTML document. A remote attacker could trigger excessive processing when the affected LastPass browser component handles such a page, resulting in a browser hang. No CVSS, CWE, or vendor-fixed version is provided in the source bundle.
Likely exposure
Exposure is most relevant to endpoints using LastPass browser extensions at or below 4.15.0. The source bundle does not identify specific browsers, operating systems, enterprise plans, or later vulnerable versions.
Exploitation context
The CVE describes remote denial of service through malicious HTML content. The source bundle does not show KEV listing, active exploitation, public exploit code, or confirmed real-world campaigns.
Researcher notes
Evidence is sparse. The CVE record gives the vulnerable behavior and version boundary, but no CVSS vector, CWE, browser matrix, patch advisory, or exploitation confirmation. Avoid expanding impact beyond browser denial of service without additional vendor evidence.
Mitigation direction
- Inventory LastPass browser extension versions across managed endpoints.
- Prioritize upgrades for installations at or below version 4.15.0.
- Check LastPass guidance for the exact fixed or supported version.
- Use browser extension management to remove unsupported LastPass builds.
- Treat repeated browser hangs on unusual pages as a user-reporting signal.
Validation and detection
- Confirm whether LastPass browser extension version is 4.15.0 or older.
- Review endpoint management records for unsupported LastPass extension builds.
- Check vendor release notes or guidance before closing remediation.
- Validate affected users can browse normally after updating.
- Record that evidence supports denial of service only.
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-2018-10193 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://twitter.com/LastPassHelp/status/955478245650071552CVE reference · x_refsource_MISC
- https://forums.lastpass.com/viewtopic.php?f=12&t=286955CVE reference · x_refsource_MISC
- https://www.youtube.com/watch?v=wTcYWZwq3TECVE 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.