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Vulnerabilities

Vulnerability · GHSA-j6q5-9jwj-9p8q

Stored XSS in Knowledge Base articles letting run JS code on link click

Published Oct 27, 2026 · catalog updated Oct 27, 2026 · Stored XSS in Knowledge

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for GHSA-j6q5-9jwj-9p8q. A missing EPSS score is not a low risk. Compare Stored XSS in Knowledge 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 in Knowledge).
  • 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
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
See sources for product scope

## Summary A regular user with create or edit access to the Knowledge Base scope can attach a JavaScript file to a Knowledge Base article and add a crafted link to its body. When an administrator clicks that link, EspoCRM runs the script in their session. The script creates an administrator account with credentials chosen by the attacker.

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

How to fix GHSA-j6q5-9jwj-9p8q

  • 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-j6q5-9jwj-9p8q. A missing EPSS score is not a low risk. Compare Stored XSS in Knowledge 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

EspoCRM 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. Oct 27, 2026 · Maintainer security tabs

    Detected

    ## Summary A regular user with create or edit access to the Knowledge Base scope can attach a JavaScript file to a Knowledge Base article and add a crafted link to its body. When an administrator clicks that link, EspoCRM runs the script in their session. The script creates an administrator account with credentials chosen by the attacker.

Sources

  • Maintainer security tabsVendor advisoryGHSA-j6q5-9jwj-9p8q

    ## Summary A regular user with create or edit access to the Knowledge Base scope can attach a JavaScript file to a Knowledge Base article and add a crafted link to its body. When an administrator clicks that link, EspoCRM runs the script in their session. The script creates an administrator account with credentials chosen by the attacker.

    github.com

Freshness

Last verified in this catalog Oct 27, 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 1, 2026