CVE-2021-34181Public exploitNetwork attack vector

Authenticated script execution via unsanitized p_name output

Published Dec 5, 2022 · Updated Apr 24, 2025

Cross-site scripting in TomExam 3.0 allows remote authenticated users to execute script in another user's browser via p_name. The user/paper/list.thtml endpoint places the p_name query value into page markup without neutralizing injected attribute syntax, allowing an autofocus onfocus handler to run. An authenticated account and victim interaction with the crafted result page are required; successful exploitation exposes or modifies data available to the victim's session.

CVSS severity6.1
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in TomExam 3.0 allows remote authenticated users to execute script in another user's browser via p_name. The user/paper/list.thtml endpoint places the p_name query value into page markup without neutralizing injected attribute syntax, allowing an autofocus onfocus handler to run. An authenticated account and victim interaction with the crafted result page are required; successful exploitation exposes or modifies data available to the victim's session.

The record

CVE
CVE-2021-34181
Published
Dec 5, 2022
Updated
Apr 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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