CVE-2023-5313Public exploitNetwork attack vector

Poll result manipulation via concurrent duplicate votes

Published Sep 30, 2023 · Updated Sep 20, 2024

Race condition in PHPKOBO Ajax Poll Script 3.18 allows remote attackers to cast duplicate votes through concurrent requests to ajax-poll.php. The poll handler relies on IP-address and cookie checks to enforce one vote per visitor, but concurrent vote requests bypass that unsynchronized control before the flat-file tally is updated. No authentication or user interaction is required; successful exploitation alters poll results without granting broader access.

CVSS severity5.3
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in PHPKOBO Ajax Poll Script 3.18 allows remote attackers to cast duplicate votes through concurrent requests to ajax-poll.php. The poll handler relies on IP-address and cookie checks to enforce one vote per visitor, but concurrent vote requests bypass that unsynchronized control before the flat-file tally is updated. No authentication or user interaction is required; successful exploitation alters poll results without granting broader access.

The record

CVE
CVE-2023-5313
Published
Sep 30, 2023
Updated
Sep 20, 2024
Vendor
PHPKOBO
Product
Ajax Poll Script
Classifications
CWE-362, CWE-837, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

PHPKOBO · Ajax Poll Scriptversion=3.18

Published CVSS scores

3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-837Improper Enforcement of a Single, Unique Action
T1565.002Transmitted Data Manipulation

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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