How severe is CVE-2023-36134?

CVE-2023-36134 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-36134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36134?

CVE-2023-36134 affects Phpjabbers Class Scheduling System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-36134?

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

When was CVE-2023-36134 published?

CVE-2023-36134 was published on 2023-08-04 and last updated on 2026-06-17.

CVE-2023-36134

CVE-2023-36134 is a critical-severity vulnerability in Phpjabbers Class Scheduling System with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-345.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Phpjabbers Class Scheduling System
Published: 2023-08-04
Last modified: 2026-06-17

Description

In PHP Jabbers Class Scheduling System 1.0, lack of verification when changing an email address and/or password (on the Profile Page) allows remote attackers to take over accounts.

Frequently asked questions

What is CVE-2023-36134?: In PHP Jabbers Class Scheduling System 1.0, lack of verification when changing an email address and/or password (on the Profile Page) allows remote attackers to take over accounts.
How severe is CVE-2023-36134?: CVE-2023-36134 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-36134 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36134?: CVE-2023-36134 affects Phpjabbers Class Scheduling System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-36134?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-36134 published?: CVE-2023-36134 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-2023-36135 — High (CVSS 7.5): User enumeration is found in in PHPJabbers Class Scheduling System v1.0. This issue occurs during password recovery,…
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…

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