CVE-2023-36133Network attack vector

Account takeover via unchallenged credential changes

Published Aug 3, 2023 · Updated Oct 17, 2024

Incorrect access control in PHPJabbers Availability Booking Calendar 5.0 allows remote authenticated users to take over an account via profile changes. The Profile function accepts email-address and password changes for the current account without requesting the existing password or another security challenge. An attacker must first obtain an authenticated session; changing the email address, which serves as the username, and password prevents the original owner from recovering access.

CVSS severity9.8
Critical
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect access control in PHPJabbers Availability Booking Calendar 5.0 allows remote authenticated users to take over an account via profile changes. The Profile function accepts email-address and password changes for the current account without requesting the existing password or another security challenge. An attacker must first obtain an authenticated session; changing the email address, which serves as the username, and password prevents the original owner from recovering access.

The record

CVE
CVE-2023-36133
Published
Aug 3, 2023
Updated
Oct 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1098
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

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

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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