CVE-2023-36131Public exploitNetwork attack vector

Password-policy bypass via intercepted password change

Published Aug 3, 2023 · Updated Oct 17, 2024

Improper access control in PHPJabbers Availability Booking Calendar 5.0 allows remote authenticated users to set a one-character password. The password-change endpoint trusts client-side complexity enforcement, so an intercepted HTTP request can submit a password that fails the intended length policy. An existing authenticated session and control of the outbound request are required; the result is a weakened account password rather than direct access to another account.

CVSS severityUnavailable
Unscored
EPSS probability0.89%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in PHPJabbers Availability Booking Calendar 5.0 allows remote authenticated users to set a one-character password. The password-change endpoint trusts client-side complexity enforcement, so an intercepted HTTP request can submit a password that fails the intended length policy. An existing authenticated session and control of the outbound request are required; the result is a weakened account password rather than direct access to another account.

The record

CVE
CVE-2023-36131
Published
Aug 3, 2023
Updated
Oct 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 17, 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

No CVSS assessment is available in this record.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

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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