Security readout for executives and security teams
Plain-English summary
CVE-2023-35335 is a high-severity cross-site scripting issue in Microsoft Dynamics 365 on-premises. It can affect sensitive CRM data if a user interacts with malicious content. The source bundle identifies affected on-premises 9.0 and 9.1 deployments and points to Microsoft’s advisory for remediation guidance.
Executive priority
Treat this as a near-term remediation item for any on-premises Dynamics 365 environment. The main business risk is confidentiality exposure from user-driven script execution, not service outage.
Technical view
This is CWE-79 cross-site scripting with CVSS 3.1 score 8.2. The vector indicates network access, low attack complexity, no required privileges, required user interaction, changed scope, high confidentiality impact, low integrity impact, and no availability impact.
Likely exposure
Organizations running Microsoft Dynamics 365 on-premises version 9.0 or 9.1 are the listed exposure group. The bundle does not identify cloud services, third-party products, or specific deployment patterns as affected.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. CVSS exploit maturity is marked unproven, but the vulnerability is remotely reachable and requires user interaction.
Researcher notes
Evidence is limited to CVE metadata and Microsoft’s advisory reference. Do not assume public exploit availability, affected cloud products, or precise fixed builds beyond the vendor guidance named in the bundle.
Mitigation direction
- Review Microsoft’s CVE-2023-35335 advisory for the official update path.
- Patch affected Dynamics 365 on-premises 9.0 and 9.1 systems per vendor guidance.
- Restrict external access to Dynamics interfaces where business operations allow.
- Increase monitoring for suspicious script-related activity around Dynamics user sessions.
Validation and detection
- Inventory all Dynamics 365 on-premises deployments and record exact versions.
- Confirm whether any listed affected versions remain in production or staging.
- Verify Microsoft guidance has been applied to each affected instance.
- Review web access logs and user reports for suspicious CRM interactions.
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-2023-35335 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
- High
- CVSS
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C
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:H/I:L/A:N/E:U/RL:O/RC:C2.84.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Microsoft Dynamics 365 (on-premises) Cross-site Scripting VulnerabilityCVE reference · vendor-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.