CVE-2025-13784VulnerabilityPublished 30 Nov 2025Updated 3 Dec 2025

CVE-2025-13784: yungifez Skuul School Management System · Cross Site Scripting

Affects yungifez Skuul School Management SystemSource CVE Database V5

Not known to be exploited · CVSS 4.8 Medium.

Data as of 26 Oct 2026, 06:26 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 20% 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 30 Nov 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 2026-10-26.

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
yungifez Skuul School Management System	Affected =2.6.0 =2.6.1 =2.6.2 =2.6.3 =2.6.4 =2.6.5	Fixed in–

AI-suggested

Given the lack of official patches, European organizations should implement several specific mitigations: 1) Restrict access to the /dashboard/schools/1/edit endpoint to only trusted and necessary users, employing network segmentation and strict access controls. 2) Implement web application firewalls (WAFs) with custom rules to detect and block malicious payloads targeting SVG file handling and XSS patterns. 3) Conduct thorough input validation and sanitization on all user-supplied data, especially SVG content, to prevent script injection. 4) Monitor logs and user activity for unusual behavior indicative of exploitation attempts, including repeated access to the vulnerable endpoint or unexpected script execution. 5) Educate privileged users about the risks of interacting with untrusted content and the importance of cautious behavior to reduce user interaction exploitation vectors. 6) Consider deploying Content Security Policy (CSP) headers to limit the impact of potential XSS attacks by restricting script execution sources. 7) Explore temporary alternatives or patches from community sources if vendor support remains unavailable. 8) Plan for timely updates once official patches are released and maintain an incident response plan tailored to web application attacks.

Description

A weakness has been identified in yungifez Skuul School Management System up to 2.6.5. This vulnerability affects unknown code of the file /dashboard/schools/1/edit of the component SVG File Handler. This manipulation causes cross site scripting. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations, particularly educational institutions using the yungifez Skuul School Management System, this vulnerability poses risks to the confidentiality and integrity of sensitive student and staff data. Exploitation could allow attackers to execute arbitrary scripts within the context of authenticated users, potentially leading to session hijacking, unauthorized data access, or manipulation of school management information. This could disrupt administrative operations, damage institutional reputation, and violate data protection regulations such as GDPR. The requirement for high privileges and user interaction reduces the likelihood of widespread exploitation but does not eliminate targeted attacks, especially from insider threats or advanced persistent threat actors. The absence of vendor response and patches increases the window of exposure, necessitating proactive defensive measures. Additionally, compromised systems could be leveraged as footholds for broader network attacks within educational networks, impacting availability and trust in digital learning environments.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 7 Dec 2025, 08:25 UTC

Technical details

References

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