Adobe Campaign Classic Gold Standard 10 (and earlier), 20.3.1 (and earlier), 20.2.3 (and earlier), 20.1.3 (and earlier), 19.2.3 (and earlier) and 19.1.7 (and earlier) are affected by a server-side request forgery (SSRF) vulnerability. Successful exploitation could allow an attacker to use the Campaign instance to issue unauthorized requests to internal or external resources.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-21009
• https://helpx.adobe.com/security/products/campaign/apsb21-04.html