CVE-2026-48939

A vulnerability in the iCagenda extension for Joomla allows the upload of arbitrary files in the file attachment feature, ultimately resulting in PHP code upload and execution.

CVSS v4.0

10.0 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:Red

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

19.73% chance of exploitation in the next 30 days, 97th percentile

CISA KEV

added 2026-07-10

Nuclei

critical · CWE-434

Published

2026-06-20

Updated

2026-08-12

Proof-of-concept exploits (3)

• Polosss/By-Poloss..-..CVE-2026-489391★ · 2026-06-29
• ChiefYoru/CVE-2026-48939_PoC
• shinthink/CVE-2026-48939

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-48939.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2017-20251
• CVE-2026-10580
• CVE-2026-11551
• CVE-2026-11912
• CVE-2026-12432
• CVE-2026-15038