CVE-2020-12477Public exploitNetwork attack vector

Authenticated IP allowlist bypass via spoofed forwarding header

Published Apr 29, 2020 · Updated Aug 4, 2024

Incorrect authorization in TeamPass 2.1.27.36 allows remote authenticated users to bypass REST API IP allowlists via a crafted header. The getIp function accepts the client-controlled first X-Forwarded-For value as the request source address and compares it with configured API addresses. A valid API token and knowledge or guessing of an allowed address are required, after which restricted API interactions become reachable from other networks.

CVSS severity7.5
High
EPSS probability1.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in TeamPass 2.1.27.36 allows remote authenticated users to bypass REST API IP allowlists via a crafted header. The getIp function accepts the client-controlled first X-Forwarded-For value as the request source address and compares it with configured API addresses. A valid API token and knowledge or guessing of an allowed address are required, after which restricted API interactions become reachable from other networks.

The record

CVE
CVE-2020-12477
Published
Apr 29, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-863, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 29, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
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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