VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 5.9 mediumEPSS 0.2% probability of exploitation in 30 daysFound by AI: AISLE
Joomla

CVE-2026-48953: Joomla! Core - [20260707] - XSS in the generic image output layout

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.2%

EPSS score, percentile 15.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
5.9 Medium

CVSS v4.0 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (1)

Which versions are affected?

Affected

  • 4.0.0-5.4.6
  • 6.0.0-6.1.1

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Joomla! Project Joomla! CMS
StatusVersions
Affected4.0.0-5.4.6
Affected6.0.0-6.1.1

Versions not listed are: unaffected.

Source: CVE List, as of . About the data.

About this vulnerability

Lack of escaping leads to an XSS vulnerability in the generic image output layout.

Summary: CVE record, as of .

  • CISA has not added CVE-2026-48953 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 7 Jul 2026.
  • The CVE record carries a CVSS v4.0 base score of 5.9 (Medium), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.2% (percentile 15.7), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total.
  • The credits in the CVE record name AISLE as finder.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

Joomla! Core - [20260707] - XSS in the generic image output layout

Lack of escaping leads to an XSS vulnerability in the generic image output layout.

Source: CVE List, as of . About the data.

Weakness

CWE-79, 1 CAPEC
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Attack patterns (CAPEC)

  • CAPEC-18: XSS Targeting Non-Script Elements

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

Known exploited Joomla vulnerabilities

  • CVE-2023-23752: Joomla! Improper Access Control Vulnerability (added )