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CVE Record

CVE-2020-9055: Versiant Lynx Customer Service Portal version 3.5.2 is vulnerable to stored cross-site scripting, which may allow an attacker to execute arbitrary JavaScript

Versiant LYNX Customer Service Portal (CSP), version 3.5.2, is vulnerable to stored cross-site scripting, which could allow a local, authenticated attacker to insert malicious JavaScript that is stored and displayed to the end user. This could lead to website redirects, session cookie hijacking, or information disclosure.

LowCVSS 3.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2020-9055 is a stored cross-site scripting flaw in Versiant LYNX Customer Service Portal 3.5.2. An authenticated local attacker could store malicious JavaScript that later runs for an end user. Business impact is limited but could include redirects, information disclosure, or session-related abuse.

Executive priority

Treat this as a low-priority but real application security issue. It is unlikely to justify emergency action unless the portal is business-critical, broadly accessible to many users, or handles sensitive operational data.

Technical view

The issue is CWE-79 stored XSS in Versiant LYNX CSP 3.5.2. CVSS 3.1 is 3.9 with AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L, meaning exploitation requires local access, low privilege, and user interaction. Sources do not name a patch or detailed mitigation.

Likely exposure

Exposure appears limited to organizations running Versiant LYNX Customer Service Portal version 3.5.2. The source bundle does not establish broad internet exposure, affected cloud services, or additional vulnerable versions.

Exploitation context

No source in the bundle indicates active exploitation, and the CVE is not listed as KEV. The described attacker is local and authenticated, with impact depending on a user viewing stored content that renders attacker-controlled JavaScript.

Researcher notes

Evidence is concise and does not include exploit details, patch status, or broader version impact. Focus validation on exact version matching, authenticated local access paths, stored-content rendering, and whether vendor guidance exists beyond the public advisories.

Mitigation direction

  • Check Versiant guidance for updates or supported remediation for LYNX CSP 3.5.2.
  • Restrict access to trusted authenticated users until vendor guidance is confirmed.
  • Review portal fields that store and render user-controlled content.
  • Apply output encoding and input validation where the application supports configuration.
  • Monitor for unusual redirects, script injection indicators, or session anomalies.

Validation and detection

  • Confirm whether LYNX Customer Service Portal 3.5.2 is deployed.
  • Inventory who has authenticated access to the portal.
  • Review pages that display stored user-supplied content to end users.
  • Use authorized non-production testing to confirm stored content is safely encoded.
  • Check vendor and CERT references for updated remediation status.
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

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.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2020-9055 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Low
CVSS
3.9 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
3.9CVSS 3.1LowCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L1.32.5Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

3.9Low
CVSS 3.1 vector shape for CVE-2020-9055Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
VersiantLYNX Customer Service Portal3.5.2Listed
Weakness

CWE details

CWE-79

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