CVE-2020-29022Public exploitNetwork attack vector

Web cache poisoning via reflected Host header

Published Feb 16, 2021 · Updated Sep 16, 2024

Host header injection in Secomea GateManager before 9.3 allows remote attackers to poison web caches through crafted HTTP requests. The GateManager web server copies an unvalidated Host header into absolute links in its response, allowing a caching proxy to store attacker-selected destinations. The interface is remotely reachable without authentication; victims who receive the poisoned response and follow its links are redirected to attacker-controlled content.

CVSS severity5.3
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Host header injection in Secomea GateManager before 9.3 allows remote attackers to poison web caches through crafted HTTP requests. The GateManager web server copies an unvalidated Host header into absolute links in its response, allowing a caching proxy to store attacker-selected destinations. The interface is remotely reachable without authentication; victims who receive the poisoned response and follow its links are redirected to attacker-controlled content.

The record

CVE
CVE-2020-29022
Published
Feb 16, 2021
Updated
Sep 16, 2024
Vendor
Secomea
Product
GateManager
Classifications
CWE-159, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=all <9.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Secomea · GateManagerversion=all <9.3

Published CVSS scores

5.3Secomea A/SCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-159Failure to Sanitize Special Element
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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