CVE-2023-51316Public exploitNetwork attack vector

Service interruption via unthrottled password-reset email flooding

Published Feb 20, 2025 · Updated Nov 4, 2025

Improper rate limiting in PHPJabbers Bus Reservation System 1.1 allows remote attackers to interrupt service through reset-email flooding. The Forgot Password handler accepts repeated unauthenticated requests for a legitimate user's address and generates an email for each request without throttling. No account is required; sustained requests can flood the recipient's mailbox and consume mail-delivery resources.

CVSS severity7.5
High
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper rate limiting in PHPJabbers Bus Reservation System 1.1 allows remote attackers to interrupt service through reset-email flooding. The Forgot Password handler accepts repeated unauthenticated requests for a legitimate user's address and generates an email for each request without throttling. No account is required; sustained requests can flood the recipient's mailbox and consume mail-delivery resources.

The record

CVE
CVE-2023-51316
Published
Feb 20, 2025
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

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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