CVE-2023-33563Public exploitNetwork attack vector

Account takeover via unverified profile changes

Published Aug 1, 2023 · Updated Oct 21, 2024

Improper authentication in PHP Jabbers Time Slots Booking Calendar 3.3 allows remote authenticated users to take over accounts. The Profile page accepts email-address or password changes without re-authenticating the current user or issuing a security challenge. An existing authenticated session is required, after which changing the email username prevents the original owner from recovering the account.

CVSS severity8.8
High
EPSS probability0.76%
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 PHP Jabbers Time Slots Booking Calendar 3.3 allows remote authenticated users to take over accounts. The Profile page accepts email-address or password changes without re-authenticating the current user or issuing a security challenge. An existing authenticated session is required, after which changing the email username prevents the original owner from recovering the account.

The record

CVE
CVE-2023-33563
Published
Aug 1, 2023
Updated
Oct 21, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 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

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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

CWE-287Improper Authentication
T1098Account Manipulation

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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