CVE-2021-47157
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
- Record
CVE-2021-47157- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-346
- Updated
- 2026-11-02
EUVDEUVD-2021-33805
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
- Record
EUVD-2021-33805- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3r58-xjch-5xjp
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
- Record
GHSA-3r58-xjch-5xjp- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-346
- Updated
- 2026-11-02
NVD
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
- Record
CVE-2021-47157- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-346
- Updated
- 2026-11-02
OSV
The Kossy module before 0.60 for Perl allows JSON hijacking because of X-Requested-With mishandling.
- Record
CVE-2021-47157- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-47157 is a critical vulnerability (CVSS 9.8) in Kossy, published March 18, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.