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CVE Record

CVE-2026-9483: SourceCodester Student Grades Management System grades.php improper authorization

A vulnerability was found in SourceCodester Student Grades Management System 1.0. Affected is an unknown function of the file grades.php. Performing a manipulation of the argument student_id results in improper authorization. The attack may be initiated remotely. The exploit has been made public and could be used.

MediumCVSS 6.5Not KEV-listed Updated
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Glexia's Take moderate

Analyst readout for executives and security teams

Plain-English summary

This flaw could let a logged-in user access or affect another student’s grade record by changing a student identifier in grades.php. It is rated medium, but grade data is sensitive and a public proof of concept exists. The supplied sources do not confirm active exploitation or a vendor patch.

Executive priority

Prioritize review if this system stores real student grades or is reachable from the internet. The issue is not confirmed as actively exploited, but public proof-of-concept availability and sensitive academic data make remediation time-sensitive.

Technical view

CVE-2026-9483 affects SourceCodester Student Grades Management System 1.0. The issue is improper authorization in grades.php involving the student_id argument, mapped to CWE-266 and CWE-285. CVSS v2 is 6.5 with network access, low complexity, and required authentication. The affected function is not identified in the supplied sources.

Likely exposure

Exposure is limited to organizations running SourceCodester Student Grades Management System 1.0. Risk is higher if the application is internet-facing or broadly accessible to students or staff. The CVSS vector indicates attackers need authentication, so anonymous exploitation is not supported by the supplied evidence.

Exploitation context

The source bundle states a public exploit exists, but CISA KEV status is false and no cited source confirms active exploitation. Treat this as credible proof-of-concept availability, not evidence of in-the-wild compromise. Do not assume broader product impact beyond version 1.0.

Researcher notes

Evidence identifies grades.php and student_id manipulation, but not the exact vulnerable function or an official fix. Validation should focus on broken object-level authorization while avoiding assumptions about other routes, versions, or SourceCodester products.

Mitigation direction

  • Check vendor or project guidance for any official fix or update.
  • Restrict access to trusted users and networks until reviewed.
  • Add server-side authorization checks before honoring student_id values.
  • Disable or replace the application if it cannot be safely fixed.
  • Monitor authenticated grade access for unusual cross-student activity.

Validation and detection

  • Inventory whether Student Grades Management System 1.0 is deployed.
  • Confirm whether grades.php is reachable by authenticated users.
  • Review code paths using student_id for authorization enforcement.
  • Perform controlled authorization testing for cross-record access boundaries.
  • Review logs for unusual grade record access patterns.
Prepared
Confidence
medium
Sources
7

Public sources used

Based on public source material and reviewed before publication.

Potential ATT&CK relevance

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 · low confidence lookup

CWE-266: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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.

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cwe · low confidence lookup

CWE-285: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookup
cve · low confidence lookup

CVE-2026-9483 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profile CVE Program record
Severity
Medium
CVSS
6.5 (2.0)
Known Exploited
No
Published

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Official CVE source material

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.

4 CVSS vectors
6 Timeline events
1 ADP providers
6 Source links

SSVC decision data

CISA-ADP CISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

4 official scores

We 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.

Score Version Severity Vector Exploit Impact Source
6.5 CVSS 2.0 Medium AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR 8 6.4 VulDB
6.3 CVSS 3.1 Medium CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R 2.8 3.4 VulDB
6.3 CVSS 3.0 Medium CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R 2.8 3.4 VulDB
5.3 CVSS 4.0 Medium CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P — — VulDB

Vulnerability scoring details

Base CVSS 4.0 score

5.3 Medium
CVSS 4.0 vector shape for CVE-2026-9483 Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timeline VulDB

    Advisory disclosed

  2. Source timeline VulDB

    VulDB entry created

  3. CVE reserved CVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timeline VulDB

    VulDB entry last update

  5. CVE published CVE Program

    The CVE record was published.

  6. CVE updated CVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADP CISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

Vendor Product Version / package Status
SourceCodester Student Grades Management System 1.0 Listed
Weakness

CWE details

CWE-266CWE-285

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-266 · source CWE mapping

Incorrect Privilege Assignment

Incorrect Privilege Assignment represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligence Same-CWE CVEs
CWE-285 · source CWE mapping

Improper Authorization

Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligence Same-CWE CVEs