VulnerabilityPublished 18 Mar 2026

CVE-2026-4356: itsourcecode University Management System · Cross-site Scripting

Affects itsourcecode University Management SystemSource CVE Database V5

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Public exploit available · CVSS 4.8 Medium.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 4.0 base score

4.8Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: High: The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
itsourcecodeUniversity Management System	Affected =1.0	Fixed in–
GitHubsulvant/Security`pkg:github/sulvant/Security`Other threats	Affected =1.0	Fixed in–

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AI-suggested

To mitigate CVE-2026-4356, organizations should first check for any official patches or updates from itsourcecode and apply them promptly once available. In the absence of patches, implement strict input validation and output encoding on the 'vr' parameter within /add_result.php to neutralize malicious scripts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Additionally, enable HTTP-only and secure flags on session cookies to reduce the risk of session hijacking. Conduct regular security audits and penetration testing focused on input handling in web applications. Educate users to recognize suspicious URLs and avoid clicking on untrusted links. Finally, consider deploying web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting this parameter.

Description

A flaw has been found in itsourcecode University Management System 1.0. Affected is an unknown function of the file /add_result.php. Executing a manipulation of the argument vr can lead to cross site scripting. The attack may be launched remotely. The exploit has been published and may be used.

Impact

The primary impact of CVE-2026-4356 is on the confidentiality and integrity of user sessions within the affected University Management System. Successful exploitation can lead to session hijacking, unauthorized actions performed on behalf of users, and potential redirection to malicious websites. This can compromise sensitive student and faculty data, disrupt academic processes, and damage institutional reputation. While the vulnerability does not directly affect system availability, the indirect consequences of compromised accounts and data leakage can be significant. Organizations relying on this system may face regulatory and compliance risks if student data is exposed. The medium CVSS score reflects the moderate risk due to the need for user interaction and some privilege requirements, but the ease of remote exploitation and published proof-of-concept increase the urgency for mitigation.

Summary

CVE-2026-4356 identifies a cross-site scripting vulnerability in itsourcecode University Management System version 1.0, specifically within the /add_result.php endpoint. The vulnerability arises from insufficient sanitization of the 'vr' parameter, which an attacker can manipulate to inject malicious JavaScript code. When a victim user accesses a crafted URL or interacts with the vulnerable page, the injected script executes in their browser context, potentially stealing session cookies, performing actions on behalf of the user, or redirecting to malicious sites. The vulnerability is remotely exploitable without requiring authentication, but user interaction is necessary to trigger the payload. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:H indicates high privileges required, but this conflicts with the description; assuming PR:H means some privilege is needed), user interaction required (UI:P), and no impact on confidentiality, integrity, or availability (VC:N, VI:L, VA:N). The published exploit proof-of-concept increases the risk of exploitation, although no active exploitation has been reported. The vulnerability affects only version 1.0 of the software, which is used primarily by educational institutions to manage academic results and student data.

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Affected software

Description

AI analysisMachine-generated, updated 18 Mar 2026, 01:43 UTC

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