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CVE-2023-36135

19
FAUCET Score

CVE-2023-36135 describes a user enumeration vulnerability in PHPJabbers Class Scheduling System v1.0. This flaw allows an attacker to determine valid usernames during password recovery by observing differing error messages, facilitating brute-force attacks. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with no user interaction, potentially leading to unauthorized access. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:phpjabbers:class_scheduling_system:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
38.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 17th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

medium.com / %40bcksec/multiple-vulnerabilities-in-php-jabbers-scripts-25af4afcadd4
phpjabbers.com / class-scheduling-system
Product