CVE-2026-74252
Unauthenticated stored XSS in J2Store guest checkout billing fields.
Is CVE-2026-74252 being exploited?
Not confirmed. CVE-2026-74252 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-74252?
CVE-2026-74252 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74252?
Not known from our data. No patch reference has been recorded for CVE-2026-74252, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-74252 affect?
CVE-2026-74252 affects J2Store 1.0.0-3.3.20, J2Store 4.0.0-4.0.20, J2Store 4.1.0-4.1.5, Joomla Input::getArray() filter, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74252?
Upgrade J2Store when patched, sanitize inputs, set variables_order to avoid COOKIE>POST, and apply WAF rules.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated stored XSS via billing fields allows script execution in victims' browsers, enabling session theft, account takeover, phishing or admin compromise.
Immediate action required
- affected1.0.0-3.3.20
- affected4.0.0-4.0.20
- affected4.1.0-4.1.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.