CVE-2025-31120Public exploitNetwork attack vector

View count manipulation via discardable client marker

Published Apr 18, 2025 · Updated Apr 18, 2025

Data manipulation in NamelessMC Nameless 2.1.4 and earlier allows remote attackers to inflate forum topic view counts without authentication. In modules/Forum/pages/forum/view_topic.php, the counter increments whenever the nl-topic-[tid] cookie or guest session marker is absent, trusting client-controlled state. Repeating topic requests without retaining that marker is sufficient to corrupt stored popularity metrics; no account or user interaction is required.

CVSS severity5.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data manipulation in NamelessMC Nameless 2.1.4 and earlier allows remote attackers to inflate forum topic view counts without authentication. In modules/Forum/pages/forum/view_topic.php, the counter increments whenever the nl-topic-[tid] cookie or guest session marker is absent, trusting client-controlled state. Repeating topic requests without retaining that marker is sufficient to corrupt stored popularity metrics; no account or user interaction is required.

The record

CVE
CVE-2025-31120
Published
Apr 18, 2025
Updated
Apr 18, 2025
Vendor
NamelessMC
Product
Nameless
Classifications
CWE-565, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 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?

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

  1. Affected versionversion=< 2.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NamelessMC · Namelessversion=< 2.2.0

Published CVSS scores

5.3GitHub, Inc.CVSS: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.

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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-565Reliance on Cookies without Validation and Integrity Checking
T1565.001Stored 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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