What’s Vulnerable › Vulnerabilities

CVE-2021-28684

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-21 · updated 2026-06-17
• Weakness: CWE-611

Description

The XML parser used in ConeXware PowerArchiver before 20.10.02 allows processing of external entities, which might lead to exfiltration of local files over the network (via an XXE attack).

Affected products

• Powerarchiver: before 20.10.02 — fixed in 20.10.02

How to fix

Upgrade to a fixed version: Powerarchiver 20.10.02. Check the vendor advisory for mitigations.

References

• https://peterka.tech/blog/posts/cve-2021-28684/
• https://www.powerarchiver.com
• https://peterka.tech/blog/posts/cve-2021-28684/
• https://www.powerarchiver.com

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