CVE-2026-74253
Unauthenticated RCE in Regular Labs Sourcerer Joomla extension (<14.0.0).
Is CVE-2026-74253 being exploited?
Not confirmed. CVE-2026-74253 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-74253?
CVE-2026-74253 is rated Critical with a CVSS score of 10.0. 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-2026-74253?
Yes. A fix has been recorded for CVE-2026-74253. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74253 affect?
CVE-2026-74253 affects Regular Labs Sourcerer <14.0.0, Joomla sites using the Sourcerer extension. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74253?
Upgrade Sourcerer to >=14.0.0 or disable/uninstall until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote code execution via crafted {source} blocks in rendered Joomla HTML; allows webshells, full site compromise, data theft.
Immediate action required
- affected1.0.0-15.0.0
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.