How should we interpret CVSS severity scores?

CVSS estimates technical severity, but it does not automatically equal business risk. Prioritize using context like internet exposure, asset criticality, known exploitation, and whether compensating controls exist. A Medium CVSS on an exposed production system can be more urgent than a Critical on an isolated non-production host.

Vulnerability Database

Q: What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

Q: What's the difference between a vulnerability, an exploit, and a zero-day?

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. Risk increases sharply when exploitation becomes reliable or widespread.

Q: Why do vulnerabilities keep reappearing in our environment?

Recurring findings usually come from incomplete asset discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host.

Q: How do we prioritize remediation without burning out the team?

Use a repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress so remediation is steady, not reactive.

Q: How can SynScan help reduce vulnerability risk over time?

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.

352,427

Total vulnerabilities in the database

Saltcorn Server Stored Cross-Site Scripting (XSS) in event logs page — @saltcorn / server

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Summary

Event log data is not properly sanitized leading to stored Cross-Site Scripting (XSS) vulnerability.

Details

file: https://github.com/saltcorn/saltcorn/blob/v1.0.0-beta.13/packages/server/routes/eventlog.js#L445

router.get(
  &quot;/:id&quot;,
  isAdmin,
  error_catcher(async (req, res) =&gt; {
    const { id } = req.params;
    const ev = await EventLog.findOneWithUser(id);
    send_events_page({
      [...]
      contents: {
        type: &quot;card&quot;,
        contents:
          [...]
          ) +
          div(
            { class: &quot;eventpayload&quot; },
            ev.payload ? pre(JSON.stringify(ev.payload, null, 2)) : &quot;&quot; //&lt;---
          ),
      },
    });
  })

PoC

The following PoC demonstrates how a non-admin user with permission to read/write on a table can inject malicious javascript code that will be executed in the event log admin panel if event logs are enabled.

To demonstrate this issue, we need to prepare some components. The following steps should be executed with an admin user.

create a table with one column of type string set read/write permission to staff users (just as an example)

visit http://localhost:3000/table/new
create a table with Table name my_table_xss and click Create
click Add field to add a field with Label called payload of type String and click Next >>
leave default values for Attributes and click Next >> - it should redirect to http://localhost:3000/table/<table-number>
under Edit table properties, set Minimum role to read and Minimum role to write to staff

create an edit view so that staff users can insert more data

visit http://localhost:3000/viewedit anc click Create View
set the following values:
- View name: my_xss_view
- View pattern: Edit
- Table: my_table_xss
- Minimum role: staff
click Configure >>
on page http://localhost:3000/viewedit/config/my_xss_view click Next >> and then Finish >>
you should see a message View my_xss_view saved

edit the site structure to add the View just created so that staff users can access it

visit http://localhost:3000/menu
set the following values:
- Type: View
- View: my_xss_view [Edit]
- Text label: view
- Minimum role: staff
click Add

create an event that will log when data is inserted in the my_table_xss table create at step 1

visit http://localhost:3000/eventlog/settings
under Which events should be logged? select:
- [X] Insert
- [X] Insert my_table_xss

visit http://localhost:3000/view/my_xss_view
in the payload field insert "<svg/onload=alert(`xss`)> and click Save

With an admin user inspect the log entry generated by the above action:

visit http://localhost:3000/eventlog
click on the event log generated (http://localhost:3000/eventlog/<event-number>)
an alert will appear

Impact

Stored Cross-Site Scripting (XSS)

Recommended Mitigation

Sanitize the user input before building HTML elements

Published: Oct 7, 2024
Updated: Jun 5, 2026
GHSA: GHSA-pf56-h9qf-rxq4
Severity: Medium
Exploit:
CISA KEV:

CVSS v3:

Severity: Medium
Score: 6.1
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWEs:

CWE-79

OWASP TOP 10:

A7 - Cross-Site Scripting (XSS)

Affected Software
References

Software	From	Fixed in
@saltcorn / server	-	1.0.0-beta.16

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Frequently Asked Questions

What is a Vulnerability (CVE) and why does it matter?

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.