Security readout for executives and security teams
Plain-English summary
CVE-2026-3302 is a cross-site scripting issue in SourceCodester Doctor Appointment System 1.0. A public exploit is referenced, but the provided sources do not show confirmed active exploitation. Business risk is mainly user-session abuse, misleading content, or data integrity impact if attackers can get a user to interact with a crafted registration flow.
Executive priority
Treat as a near-term web application hygiene issue, not an emergency absent exploitation evidence. Prioritize if the system is internet-facing, handles patient information, or supports public registration. Apply vendor guidance or compensating controls promptly.
Technical view
The issue affects /register.php on the Sign Up page. Manipulation of the Email argument can trigger cross-site scripting remotely. CVSS v4.0 is 5.3, with network access, low attack complexity, no privileges, and user interaction required. Sources list CWE-79 and CWE-94, but the described behavior is XSS.
Likely exposure
Exposure is likely limited to organizations running SourceCodester Doctor Appointment System version 1.0 with the registration page reachable by users or the internet.
Exploitation context
The source bundle says an exploit has been made public and could be used for attacks. It does not provide KEV listing or other evidence of active exploitation. User interaction is required, reducing urgency compared with unauthenticated server compromise flaws.
Researcher notes
Public references identify /register.php and the Email parameter, but do not establish a vendor patch in the provided bundle. Avoid assuming broader product versions are affected. Validate scope against deployed code because SourceCodester applications are often customized after download.
Mitigation direction
- Check SourceCodester or project guidance for an update or official fix.
- Restrict public access to /register.php if registration is not required.
- Validate and encode the Email field before rendering it in responses.
- Use a web application firewall rule as temporary risk reduction.
- Review the application for similar unsanitized reflected inputs.
Validation and detection
- Confirm whether SourceCodester Doctor Appointment System 1.0 is deployed.
- Identify whether /register.php is internet-accessible or user-accessible.
- Review registration code for Email input validation and output encoding.
- Safely test in a non-production environment for reflected script execution.
- Check access logs for unusual registration requests targeting the Email field.
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 lookupCWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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-2026-3302 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
- 5.3 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.3MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Source materials
- CVE List V5 sourceCVE List V5
- VDB-348053 | SourceCodester Doctor Appointment System Sign Up register.php cross site scriptingCVE reference · vdb-entry, technical-description
- VDB-348053 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference · signature, permissions-required
- Submit #762427 | SourceCodester Doctor Appointment System 1 Cross Site ScriptingCVE reference · third-party-advisory
- https://github.com/rayficom/Proof-of-Concept/blob/main/20260219/README.mdCVE reference · exploit
- https://www.sourcecodester.com/CVE reference · product
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.
Improper Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.