Security readout for executives and security teams
Plain-English summary
HotelRunner B2B versions before 4 June 2025 contain a cross-site scripting flaw. A highly privileged user could introduce content that executes in another user's browser after interaction, potentially exposing limited information or changing limited data. The published severity is medium, with no availability impact identified.
Executive priority
Treat as a scheduled, moderate-priority remediation. Promptly identify any pre-cutoff deployments and prioritize externally reachable or broadly used instances. Escalate if privileged accounts are shared, weakly protected, or suspected compromised. No emergency response is supported by the supplied exploitation evidence.
Technical view
CVE-2025-4294 is CWE-79 improper neutralization during web-page generation. CVSS 3.1 is 4.8: network-accessible, low complexity, high privileges required, user interaction required, changed scope, low confidentiality and integrity impact, and no availability impact. The affected component is HotelRunner B2B before 04.06.2025.
Likely exposure
Exposure is limited to HotelRunner B2B deployments predating 04.06.2025. Practical risk depends on whether highly privileged users can submit affected input and another user renders it. The sources do not identify vulnerable fields, deployment models, or affected customer configurations.
Exploitation context
The bundle does not report active exploitation, and the CVE is not listed as KEV. Exploitation requires high privileges and user interaction, reducing likelihood, but successful abuse could cross a security boundary and affect browser-visible data or actions. Absence from KEV does not prove exploitation has never occurred.
Researcher notes
Public details are sparse: no vulnerable parameter, attack surface, proof of concept, patch identifier, or observed exploitation is provided. The version data includes “0” while the narrative defines exposure by date; use the before-04.06.2025 cutoff and confirm exact release mapping with HotelRunner.
Mitigation direction
- Confirm the deployed HotelRunner B2B release date or version with the vendor.
- Upgrade to a release dated 04.06.2025 or later, subject to vendor confirmation.
- Restrict privileged content-entry access until remediation is verified.
- Review vendor guidance for any additional configuration or sanitization measures.
Validation and detection
- Inventory all HotelRunner B2B instances and record their versions or release dates.
- Verify each instance is dated 04.06.2025 or later.
- Review privileged input paths and rendered output in an authorized test environment.
- Check security logs for suspicious privileged content changes and related user reports.
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 lookupCVE-2025-4294 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
- Medium
- CVSS
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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.
SSVC decision data
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:H/UI:R/S:C/C:L/I:L/A:N1.72.7TR-CERTVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.usom.gov.tr/bildirim/tr-25-0169CVE reference, TR-CERT · government-resource, broken-link
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-25-0169CVE reference, TR-CERT · government-resource
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.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.