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Timetabling System CVE-2026-15596

LOW
Cross-site Scripting (XSS) (CWE-79)
2026-07-13 VulDB
PHP XSS Class And Exam Timetabling System
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.1 MEDIUM

Network XSS with no privileges required; scope changes to victim browser (S:C) enabling low confidentiality and integrity impact via cookie theft and content injection.

3.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

4
Severity Changed
Jul 13, 2026 - 22:22 NVD
MEDIUM LOW
CVSS changed
Jul 13, 2026 - 22:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
Analysis Generated
Jul 13, 2026 - 22:12 vuln.today
CVE Published
Jul 13, 2026 - 21:30 cve.org
MEDIUM 5.3

DescriptionCVE.org

A vulnerability was identified in SourceCodester Class and Exam Timetabling System 1.0. The impacted element is an unknown function of the file /subject.php. Such manipulation of the argument subject leads to cross site scripting. It is possible to launch the attack remotely. The exploit is publicly available and might be used.

AnalysisAI

Cross-site scripting in SourceCodester Class and Exam Timetabling System 1.0 exposes users to script injection via the unvalidated subject parameter in /subject.php, exploitable remotely by unauthenticated attackers. A publicly available proof-of-concept exists on GitHub, confirming practical exploitability with minimal attacker skill. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft XSS payload in subject parameter URL
Delivery
Deliver crafted link to target user
Exploit
Victim loads /subject.php with injected payload
Execution
Browser executes unsanitized script in victim session
Impact
Steal session cookie or perform in-session actions
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Vulnerability AssessmentAI

Exploitation The SourceCodester Class and Exam Timetabling System 1.0 must be deployed and the `/subject.php` endpoint must be accessible to the attacker over the network (AV:N). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N) places this as medium severity - network-reachable, zero-complexity, no-privilege exploitation offset only by the requirement for passive victim interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a URL targeting `/subject.php` with a JavaScript payload injected into the `subject` parameter and socially engineers a logged-in user - such as a teacher or administrator - into clicking the link. The victim's browser renders the unsanitized parameter and executes the attacker's script, enabling session cookie theft, credential harvesting via fake login overlays, or unauthorized actions within the timetabling application. …
Remediation No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-15596 vulnerability details – vuln.today
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