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CVE Record

CVE-2018-1000855: easymon version 1.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Endpoint where monit...

easymon version 1.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Endpoint where monitoring is mounted that can result in Reflected XSS that affects Firefox. Can be used to steal cookies, depending on the cookie settings.. This attack appear to be exploitable via The victim must click on a crafted URL that contains the XSS payload. This vulnerability appears to have been fixed in 1.4.1 and later.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This vulnerability is a reflected XSS issue in easymon 1.4 and earlier. A user would need to click a maliciously crafted URL, and the reported browser impact specifically mentions Firefox. Business risk is most relevant where easymon monitoring pages are reachable by staff using authenticated sessions.

Executive priority

Treat this as a targeted hygiene issue, not an emergency, unless vulnerable easymon monitoring pages are exposed to many users or the internet. Prioritize upgrade or retirement during normal vulnerability remediation cycles.

Technical view

CVE-2018-1000855 is a reflected XSS in easymon 1.4 and earlier at the mounted monitoring endpoint. A crafted URL can reflect script in Firefox; impact may include cookie theft depending on cookie settings. The source bundle states it was fixed in 1.4.1 and later. No CVSS, CWE, or CPE detail is provided.

Likely exposure

Exposure is likely limited to organizations still running easymon 1.4 or earlier, especially where the monitoring endpoint is accessible to browser users. The source data does not provide CPEs, package ecosystem metadata, or deployment prevalence.

Exploitation context

The provided sources do not indicate active exploitation, and the CVE is not marked KEV. Exploitation requires user interaction: the victim must click a crafted URL. The stated impact is reflected XSS affecting Firefox, with cookie theft possible depending on cookie settings.

Researcher notes

Evidence is sparse: no CVSS vector, CWE, CPE, detailed patch notes, or exploitation telemetry are included. The key facts are reflected XSS, easymon 1.4 and earlier, Firefox-specific reported impact, user-click requirement, and fix in 1.4.1 or later.

Mitigation direction

  • Inventory easymon deployments and confirm whether version 1.4 or earlier is present.
  • Upgrade easymon to 1.4.1 or later where the software is still used.
  • Review the linked vendor issue and pull request before changing production monitoring.
  • Restrict monitoring endpoint access to trusted users and networks where practical.
  • Use defensive cookie settings such as HttpOnly where supported by the application.

Validation and detection

  • Confirm running easymon versions from deployment manifests, lockfiles, or host package records.
  • Verify the mounted monitoring endpoint is not publicly accessible unless intentionally required.
  • Check whether the deployed version includes the fix associated with easymon 1.4.1.
  • Review browser-facing session cookie flags for applications sharing the monitoring context.
  • Document any exception where upgrade is not possible and track compensating controls.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2018-1000855 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.