CVE-2020-29205Public exploitNetwork attack vector

Stored XSS via unencoded signup name

Published May 17, 2021 · Updated Aug 4, 2024

Stored XSS in Project Worlds Online Examination System 1.0 allows remote attackers to execute script via the signup name field. sign.php case-normalizes and stores the submitted name without HTML sanitization, while account.php concatenates it directly into page markup. No authentication is needed to plant the payload, but a user must sign in or view a ranking that renders the stored name; the script then runs in that viewer's browser session.

CVSS severity6.1
Medium
EPSS probability1.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Project Worlds Online Examination System 1.0 allows remote attackers to execute script via the signup name field. sign.php case-normalizes and stores the submitted name without HTML sanitization, while account.php concatenates it directly into page markup. No authentication is needed to plant the payload, but a user must sign in or view a ranking that renders the stored name; the script then runs in that viewer's browser session.

The record

CVE
CVE-2020-29205
Published
May 17, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/C:N/I:P/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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