CVE-2021-37573Public exploitNetwork attack vector

Browser script execution via unencoded 404 path

Published Aug 9, 2021 · Updated Aug 4, 2024

Reflected XSS in D. Rogatkin TJWS 1.115 and earlier allows remote attackers to execute JavaScript in a victim’s browser via a crafted URL. The 404 handler decodes an attacker-controlled request path and inserts it without HTML encoding into the response title and H2 text. Exploitation requires a victim to open the crafted URL; the script runs in the security context of the TJWS-hosted page.

CVSS severity6.1
Medium
EPSS probability3.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in D. Rogatkin TJWS 1.115 and earlier allows remote attackers to execute JavaScript in a victim’s browser via a crafted URL. The 404 handler decodes an attacker-controlled request path and inserts it without HTML encoding into the response title and H2 text. Exploitation requires a victim to open the crafted URL; the script runs in the security context of the TJWS-hosted page.

The record

CVE
CVE-2021-37573
Published
Aug 9, 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. Aug 9, 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

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV: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.

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-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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