What’s Vulnerable › Vulnerabilities

CVE-2021-47157

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-03-18 · updated 2026-06-17
• Weakness: CWE-346

Description

The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.

Affected products

• Kossy: before 0.60 — fixed in 0.60

How to fix

Upgrade to a fixed version: Kossy 0.60. Check the vendor advisory for mitigations.

References

• https://github.com/kazeburo/Kossy/pull/16
• https://metacpan.org/dist/Kossy/changes
• https://github.com/kazeburo/Kossy/pull/16
• https://metacpan.org/dist/Kossy/changes

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