CVE-2020-21503

Name: CVE-2020-21503
Creator: NVD / NIST
Published: 2021-10-05T22:15:07.613+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.02%

Last modified Jun 17, 2026

CVE-2020-21503 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.02%

58.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-668

Affected Software

Vendor	Product	Versions
Waimai Super Cms Project	Waimai Super Cms	20150505

References

https://github.com/caokang/waimai/issues/15Exploit, Third Party Advisory
https://github.com/caokang/waimai/issues/15Exploit, Third Party Advisory

Timeline

Published: Oct 5, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21503?

How severe is CVE-2020-21503?

CVE-2020-21503 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21503?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21503?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST