CVE-2021-34637Network attack vector

Stored script injection via forged settings requests

Published Aug 2, 2021 · Updated Sep 17, 2024

Cross-site request forgery in iTux Post Index 0.7.5 and earlier allows remote attackers to store arbitrary scripts through plugin settings. The OptionsPage function in php/settings.php processes forged settings requests as the logged-in user and persists attacker-supplied web script. Exploitation requires an authenticated user authorized to change plugin settings to visit attacker-controlled content; the stored script then executes in site visitors’ browsers.

CVSS severity8.8
High
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in iTux Post Index 0.7.5 and earlier allows remote attackers to store arbitrary scripts through plugin settings. The OptionsPage function in php/settings.php processes forged settings requests as the logged-in user and persists attacker-supplied web script. Exploitation requires an authenticated user authorized to change plugin settings to visit attacker-controlled content; the stored script then executes in site visitors’ browsers.

The record

CVE
CVE-2021-34637
Published
Aug 2, 2021
Updated
Sep 17, 2024
Vendor
iTux
Product
Post Index
Classifications
CWE-352, CAPEC-62, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=0.7.5 <=0.7.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

iTux · Post Indexversion=0.7.5 <=0.7.5

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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