Security readout for executives and security teams
Plain-English summary
CVE-2023-3757 is a cross-site scripting flaw in GZ Scripts Car Rental Script 1.8. An attacker who can reach the checkout flow may inject script content through customer detail fields, potentially affecting users who view the resulting page. The bundle does not name a vendor fix or active exploitation.
Executive priority
Treat as a moderate web application risk. It is not presented as business-critical or actively exploited, but customer-facing booking systems can expose staff or users to browser-based attacks. Prioritize confirmation of product use and vendor support status.
Technical view
The issue is CWE-79 in /EventBookingCalendar/load.php on the checkout calendar route. Manipulated first_name, second_name, phone, address_1, or country parameters can cause XSS. CVSS v2 is 4.0 with network access, low complexity, single authentication, partial integrity impact, and no confidentiality or availability impact.
Likely exposure
Exposure is likely limited to organizations running GZ Scripts Car Rental Script 1.8 with the EventBookingCalendar checkout route reachable. No CPEs are provided, so asset matching may require application inventory, code review, or vendor/product fingerprinting.
Exploitation context
The sources say the attack can be launched remotely, but the CVSS vector indicates authentication is required. The bundle does not report CISA KEV listing, active exploitation, or a public weaponized exploit. Vendor contact reportedly received no response.
Researcher notes
Evidence is narrow: VulDB/CVE identify the product, version, route, and affected parameters, but not the vulnerable function, patch, or exploit maturity. Authentication requirements are inferred from the CVSS vector, while the narrative confirms remote attack possibility.
Mitigation direction
- Check GZ Scripts guidance for a fixed release or supported workaround.
- Restrict access to the affected checkout route if operationally acceptable.
- Apply strong output encoding and input handling in locally maintained deployments.
- Monitor booking submissions for suspicious script-like content.
- Consider replacement if version 1.8 remains unsupported.
Validation and detection
- Inventory sites for GZ Scripts Car Rental Script version 1.8.
- Confirm whether the EventBookingCalendar checkout route is reachable.
- Review whether named customer fields are rendered back to users or staff.
- Check logs for suspicious submissions in the affected fields.
- Verify any vendor or local remediation in staging before production.
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-2023-3757 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 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:S/C:N/I:P/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.
AV:N/AC:L/Au:S/C:N/I:P/A:N82.9Primary CVE scoreVulnerability scoring details
Base CVSS 2.0 score
4MediumVector: AV:N/AC:L/Au:S/C:N/I:P/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://vuldb.com/?id.234432CVE reference · vdb-entry, technical-description
- https://vuldb.com/?ctiid.234432CVE reference · signature
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.