CVE-2020-21503
CVSS v3
7.5
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
waimai Super Cms 20150505 has a logic flaw allowing attackers to modify a price, before form submission, by observing data in a packet capture. By setting the index.php?m=gift&a=addsave credit parameter to -1, the product is sold for free.
Technical details
- Published
- 2021-10-05
Frequently asked questions
What is CVE-2020-21503?
waimai Super Cms 20150505 has a logic flaw allowing attackers to modify a price, before form submission, by observing data in a packet capture. By setting the index.php?m=gift&a=addsave credit parameter to -1, the product is sold for free.
Is CVE-2020-21503 actively exploited?
Active exploitation of CVE-2020-21503 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-21503?
CVE-2020-21503 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2020-21503 affecting your environment?
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