CVE-2017-20273

Joomla Event Registration Pro Calendar 4.1.3 contains an SQL injection vulnerability that allows unauthenticated attackers to execute arbitrary SQL queries by injecting malicious code through the id parameter. Attackers can send GET requests to index.php with option=com_registrationpro&view=category&id parameter containing SQL injection payloads to extract sensitive database information.

CVSS v4.0

8.8 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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:X/R:X/V:X/RE:X/U:X

CVSS v3.1

8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

EPSS

0.29% chance of exploitation in the next 30 days, 22th percentile

Published

2026-06-19

Updated

2026-07-15

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/42416

References

• CVE Record
• NVD entry

Related

• CVE-2017-20272
• CVE-2017-20274
• CVE-2017-20271
• CVE-2017-20275
• CVE-2017-20270
• CVE-2017-20276