CVE-2020-15011Network attack vector

Content injection via unescaped login-page path

Published Jun 24, 2020 · Updated Aug 4, 2024

Content injection in GNU Mailman before 2.1.33 allows remote attackers to alter a private archive login page through a crafted URL. Cgi/private.py fails to neutralize attacker-controlled path content before rendering it in the login page. Exploitation requires the list's private_roster setting to be Anyone and a victim to open the crafted page; the documented effect is page-content modification.

CVSS severity4.3
Medium
EPSS probability1.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Content injection in GNU Mailman before 2.1.33 allows remote attackers to alter a private archive login page through a crafted URL. Cgi/private.py fails to neutralize attacker-controlled path content before rendering it in the login page. Exploitation requires the list's private_roster setting to be Anyone and a victim to open the crafted page; the documented effect is page-content modification.

The record

CVE
CVE-2020-15011
Published
Jun 24, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 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

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
2.6NIST NVDAV:N/AC:H/Au:N/C:N/I:P/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1204.001Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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