CVE-2025-9306VulnerabilityPublished 21 Aug 2025

CVE-2025-9306: SourceCodester Advanced School Management System · Cross Site Scripting

Affects SourceCodester Advanced School Management SystemSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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: Low
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: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
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 21 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), the Metasploit, Exploit-DB and nuclei-templates index as of 26 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC 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
SourceCodester Advanced School Management System	Affected =1.0	Fixed in–

AI-suggested

Organizations should immediately implement input validation and output encoding on the 'noticeSubject' parameter to neutralize malicious scripts. Web application firewalls (WAFs) can be configured to detect and block typical XSS payloads targeting this endpoint. Administrators should monitor logs for suspicious requests to /index.php/notice/addNotice and educate users to avoid clicking on untrusted links or notices. If possible, disable or restrict the addNotice functionality until a vendor patch is available. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. Regularly update and patch the SourceCodester system once a fix is released. Additionally, conduct security awareness training for users to recognize phishing attempts that may leverage this vulnerability.

Description

A vulnerability was detected in SourceCodester Advanced School Management System 1.0. The impacted element is an unknown function of the file /index.php/notice/addNotice. The manipulation of the argument noticeSubject results in cross site scripting. It is possible to launch the attack remotely. The exploit is now public and may be used.

Impact

For European organizations, especially educational institutions using SourceCodester Advanced School Management System 1.0, this vulnerability poses a moderate risk. Successful exploitation could allow attackers to execute arbitrary scripts in the browsers of staff, students, or administrators, potentially leading to theft of session cookies, credential theft, or unauthorized actions performed on behalf of the victim. This could result in unauthorized access to sensitive student data, manipulation of school notices, or spreading malware within the institution's network. While the vulnerability does not directly compromise system integrity or availability, the indirect consequences of stolen credentials or session tokens could escalate to more severe breaches. Given the reliance on digital school management platforms in Europe, exploitation could disrupt normal educational operations and damage institutional reputation. The lack of a patch increases exposure, and the public availability of exploit details raises the likelihood of opportunistic attacks.

Summary

CVE-2025-9306 is a cross-site scripting (XSS) vulnerability identified in SourceCodester Advanced School Management System version 1.0. The vulnerability resides in the /index.php/notice/addNotice endpoint, specifically in the handling of the 'noticeSubject' parameter. An attacker can remotely manipulate this parameter to inject malicious scripts that execute in the context of the victim's browser. This type of vulnerability allows attackers to bypass the same-origin policy, potentially leading to session hijacking, defacement, or redirection to malicious sites. The vulnerability requires no authentication but does require some user interaction (e.g., a victim clicking a crafted link or viewing a malicious notice). The CVSS 4.0 base score is 5.1 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, but user interaction is necessary. The impact on confidentiality is none, integrity is low, and availability is none. The vulnerability is publicly disclosed, but no known exploits in the wild have been reported yet. No official patches or mitigations have been published by the vendor at this time.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Aug 2025, 01:12 UTC

Technical details

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