CVE-2021-42949Network attack vector

Authentication bypass via predictable session tokens

Published Sep 16, 2022 · Updated Jun 3, 2025

Improper authentication in controlla_login in DigitalDruid HotelDruid 3.0.3 allows remote attackers to gain authenticated access via brute force. The function builds each session ID from the date, time, a six-digit random value, and an incrementing login-attempt counter, making live tokens guessable. Exploitation requires matching a token's client data; the user-agent is guessable, while the address check can fail behind a proxy or on the victim host.

CVSS severity9.8
Critical
EPSS probability7.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in controlla_login in DigitalDruid HotelDruid 3.0.3 allows remote attackers to gain authenticated access via brute force. The function builds each session ID from the date, time, a six-digit random value, and an incrementing login-attempt counter, making live tokens guessable. Exploitation requires matching a token's client data; the user-agent is guessable, while the address check can fail behind a proxy or on the victim host.

The record

CVE
CVE-2021-42949
Published
Sep 16, 2022
Updated
Jun 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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-287Improper Authentication
T1550.004Use Alternate Authentication Material: Web Session Cookie

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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