Security readout for executives and security teams
Plain-English summary
CVE-2015-20116 is a stored cross-site scripting issue in Next Click Ventures RealtyScript 4.0.2. A malicious CSV upload filename can cause JavaScript to run in another user’s browser when the filename is later processed or displayed. Business impact is mainly account/session risk and content manipulation in affected RealtyScript deployments.
Executive priority
Treat as a moderate-priority web application issue. Prioritize affected public-facing RealtyScript 4.0.2 sites or environments where untrusted users can upload CSV files. It is not marked as actively exploited in KEV.
Technical view
RealtyScript 4.0.2 does not properly sanitize CSV upload filenames in multipart form data. The issue is classified as CWE-79 with CVSS 3.1 score 6.1. The vector indicates network access, low attack complexity, no privileges, required user interaction, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure appears limited to organizations running RealtyScript 4.0.2 with CSV upload functionality reachable by attackers or untrusted users. The sources do not identify other affected versions or products.
Exploitation context
The source bundle includes a public ExploitDB reference, so exploit information is publicly available. CISA KEV is false, and the provided sources do not state active exploitation in the wild.
Researcher notes
Evidence is strongest for RealtyScript 4.0.2 only. Public references describe stored XSS through uploaded CSV filenames. No official vendor patch details are included in the provided sources, so remediation should be verified against vendor guidance or application code review.
Mitigation direction
- Check Next Click Ventures or RealtyScript guidance for an official fix or upgrade path.
- Restrict CSV upload access to trusted users until remediation is confirmed.
- Ensure uploaded filenames are safely encoded before display.
- Monitor application logs for suspicious CSV upload filenames.
- Consider compensating controls in a WAF where filename XSS patterns are detectable.
Validation and detection
- Inventory internet-facing and internal RealtyScript instances.
- Confirm whether version 4.0.2 is deployed.
- Identify whether CSV upload functionality is enabled and reachable.
- Review code or configuration for filename sanitization and output encoding.
- Test safely in staging without using production accounts or real user data.
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.
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.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2015-20116 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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 vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-38496CVE reference · exploit
- Zero Science Lab DisclosureCVE reference · third-party-advisory
- VulnCheck Advisory: RealtyScript 4.0.2 Stored Cross-Site Scripting via CSV File Upload FilenameCVE reference · third-party-advisory
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.