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Vulnerabilities

Security incident · GHSA-75fw-j788-j4hj

Stored XSS via Unsafe Attribute Construction and Field HTML Insertion

Published Aug 12, 2026 · catalog updated Aug 12, 2026 · Stored XSS via Unsafe

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-75fw-j788-j4hj. A missing EPSS score is not a low risk. Compare Stored XSS via Unsafe with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Stored XSS via Unsafe).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Medium5.2
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
See sources for product scope

## Summary Four stored cross-site scripting sink variants appear to remain outside the fix for GHSA-jm2f-ch62-rpxr. They are caused by unsafe HTML attribute construction in OPNsense WebGUI pages, where stored or cached values are interpolated into HTML strings without attribute-context escaping. Dynamic browser execution was confirmed for: 1. Firewall Alias category tooltip attribute injection 2. IPsec SPD description tooltip attribute injection 3. Traffic Shaper relation description tooltip attribute injection in Firewall Rules 4. Suricata metadata property attribute injection in IDS Policy Editor The duplicate IPsec SAD renderer is static-equivalent to the confirmed SPD sink but was not separately confirmed with a live browser alert. Tested affected version: OPNsense . ## Relationship to GHSA-jm2f-ch62-rpxr / d0ffce2 The following previously reported field issues appear to be covered by and are not included as active missing items in this follow-up: - Suricata rule metadata XSS, through the generic change that removed before insertion into fields. - Auth Group/User DOM XSS, through the same generic form mapper change. The relevant change is: This follow-up focuses on the remaining unsafe attribute-construction sinks that do not appear to be covered by . ## Findings ### 1. Firewall Alias Category Tooltip Attribute Injection **Suggested severity: Medium when a referenced category already exists** — the writer privilege ( ) and victim privilege ( ) are separate. GHSA-2xrm-p255-p43h fixed the same category-name source in Firewall Rules and NAT views, but the Alias view was not patched. permits quote characters in . The Alias page recovers the category name as text and then concatenates it into a single-quoted attribute without attribute-context encoding: **Execution PoC**: Create a Firewall category with name: Assign it to an alias. Open and hover the colored category dot. Generated DOM: **Reporting note**: This is an unpatched sink for the same source field and mecha

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix GHSA-75fw-j788-j4hj

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Advisory

    Open the inventory_github record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for GHSA-75fw-j788-j4hj. A missing EPSS score is not a low risk. Compare Stored XSS via Unsafe with the linked advisory before you change production.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

OPNsense security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 12, 2026 · Maintainer security tabs

    Detected

    ## Summary Four stored cross-site scripting sink variants appear to remain outside the fix for GHSA-jm2f-ch62-rpxr. They are caused by unsafe HTML attribute construction in OPNsense WebGUI pages, where stored or cached values are interpolated into HTML strings without attribute-context escaping. Dynamic browser execution was confirmed for: 1. Firewall Alias category tooltip attribute injection 2.

Sources

  • Maintainer security tabsVendor advisoryGHSA-75fw-j788-j4hj

    ## Summary Four stored cross-site scripting sink variants appear to remain outside the fix for GHSA-jm2f-ch62-rpxr. They are caused by unsafe HTML attribute construction in OPNsense WebGUI pages, where stored or cached values are interpolated into HTML strings without attribute-context escaping. Dynamic browser execution was confirmed for: 1. Firewall Alias category tooltip attribute injection 2.

    github.com

Freshness

Last verified in this catalog Aug 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 2, 2026