How severe is CVE-2026-48952?

CVE-2026-48952 has a CVSS 4.0 base score of 5.9, rated medium severity.

Is CVE-2026-48952 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-48952?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-48952 published?

CVE-2026-48952 was published on 2026-07-07 and last updated on 2026-07-08.

CVE-2026-48952

CVE-2026-48952 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 4.0 base score 5.9)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Published: 2026-07-07
Last modified: 2026-07-08

Description

Lack of escaping leads to an XSS vulnerability in the update list view of com_installer.

Frequently asked questions

What is CVE-2026-48952?: Lack of escaping leads to an XSS vulnerability in the update list view of com_installer.
How severe is CVE-2026-48952?: CVE-2026-48952 has a CVSS 4.0 base score of 5.9, rated medium severity.
Is CVE-2026-48952 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-48952?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-48952 published?: CVE-2026-48952 was published on 2026-07-07 and last updated on 2026-07-08.

References

https://developer.joomla.org/security-centre/1060-20260706-core-xss-in-com-installer.html

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