How severe is CVE-2023-36135?

CVE-2023-36135 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-36135 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36135?

CVE-2023-36135 affects Phpjabbers Class Scheduling System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-36135?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-36135 published?

CVE-2023-36135 was published on 2023-08-04 and last updated on 2026-06-17.

CVE-2023-36135

CVE-2023-36135 is a high-severity vulnerability in Phpjabbers Class Scheduling System with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Phpjabbers Class Scheduling System
Published: 2023-08-04
Last modified: 2026-06-17

Description

User enumeration is found in in PHPJabbers Class Scheduling System v1.0. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.

Frequently asked questions

What is CVE-2023-36135?: User enumeration is found in in PHPJabbers Class Scheduling System v1.0. This issue occurs during password recovery, where a difference in messages could allow an attacker to determine if the user is valid or not, enabling a brute force attack with valid users.
How severe is CVE-2023-36135?: CVE-2023-36135 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-36135 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36135?: CVE-2023-36135 affects Phpjabbers Class Scheduling System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-36135?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-36135 published?: CVE-2023-36135 was published on 2023-08-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:phpjabbers:class_scheduling_system:1.0:*:*:*:*:*:*:*

More vulnerabilities in Phpjabbers Class Scheduling System

CVE-2023-36134 — Critical (CVSS 9.8): In PHP Jabbers Class Scheduling System 1.0, lack of verification when changing an email address and/or password (on the…
CVE-2023-36136 — Medium (CVSS 6.5): PHPJabbers Class Scheduling System 1.0 lacks encryption on the password when editing a user account (update user page)…
CVE-2023-36137 — Medium (CVSS 6.1): There is a Cross Site Scripting (XSS) vulnerability in the "theme" parameter of preview.php in PHPJabbers Class…

All CVEs affecting Phpjabbers Class Scheduling System →