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VulnerabilityPublished Updated

CVE-2023-51339: PHPJabbers Event Ticketing System · Unthrottled Resource Allocation

Source CVE Database V5

0

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Feb 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

AI-suggested

To mitigate CVE-2023-51339, organizations should implement strict rate limiting on the 'Forgot Password' feature to restrict the number of password reset requests per user account and per IP address within a defined time frame. This can be achieved by configuring application-level controls or using web application firewalls (WAFs) with custom rules. Monitoring email traffic for unusual spikes and setting alerts can help detect potential abuse early. Organizations should also consider implementing CAPTCHA challenges on password reset forms to prevent automated abuse. Reviewing and enhancing authentication mechanisms to ensure only legitimate users can trigger password resets will reduce risk. Since no official patches are currently available, organizations should contact PHPJabbers for updates or consider upgrading to newer versions if available. Additionally, ensuring robust email infrastructure capacity and redundancy can help absorb unexpected load. Finally, educating users about phishing risks and encouraging strong password hygiene complements technical controls.

Description

A lack of rate limiting in the 'Forgot Password' feature of PHPJabbers Event Ticketing System v1.0 allows attackers to send an excessive amount of email for a legitimate user, leading to a possible Denial of Service (DoS) via a large amount of generated e-mail messages.

References

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