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Fencer Vulns
medium 5.3

CVE-2020-29022 json

Host Header Injection allowing web cache poisoning attacks

published 2021-02-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-21404

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits
0
none known

Summary

Failure to Sanitize host header value on output in the GateManager Web server could allow an attacker to conduct web cache poisoning attacks. This issue affects Secomea GateManager all versions prior to 9.3

Patch / fix

  • Secomea GateManager 9.3

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Secomea GateManager

Classification

Weakness
  • CWE-159 Improper Handling of Invalid Use of Special Elements

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.