CVE-2020-12273Public exploitNetwork attack vector

Unauthenticated credential disclosure via viewer parameter

Published Apr 27, 2020 · Updated Aug 4, 2024

Information disclosure in TestLink 1.9.20 allows remote attackers to expose cleartext credentials through a crafted login.php viewer parameter. The init_args() routine copies the untrusted viewer request value into its viewer field; the upstream patch disables that assignment and forces the field to an empty string. No authentication or user interaction is required, and the reported consequence is limited to disclosure of credentials handled by the login endpoint.

CVSS severity7.5
High
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in TestLink 1.9.20 allows remote attackers to expose cleartext credentials through a crafted login.php viewer parameter. The init_args() routine copies the untrusted viewer request value into its viewer field; the upstream patch disables that assignment and forces the field to an empty string. No authentication or user interaction is required, and the reported consequence is limited to disclosure of credentials handled by the login endpoint.

The record

CVE
CVE-2020-12273
Published
Apr 27, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-311, CWE-522, T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 27, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-311Missing Encryption of Sensitive Data
CWE-522Insufficiently Protected Credentials
T1552Unsecured Credentials

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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