CVE-2026-77027
Unauthenticated stored XSS in Fabrik Joomla extension allows persistent script injection.
Is CVE-2026-77027 being exploited?
Not confirmed. CVE-2026-77027 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 0.26% probability of exploitation in the next 30 days.
How severe is CVE-2026-77027?
CVE-2026-77027 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-2026-77027?
Yes. A fix has been recorded for CVE-2026-77027. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77027 affect?
CVE-2026-77027 affects Fabrik Joomla extension < 4.7.2, Joomla sites using Fabrik forms/jsactions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77027?
Upgrade Fabrik to 4.7.2+, apply WAF rule for XSS, rotate admin sessions/credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated stored XSS: attacker can inject persistent JS to steal sessions, hijack accounts, deface sites, or deliver malware.
Immediate action required
- affected1.0.0-4.7.1
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.