CVE-2021-37499Network attack vector

HTTP header injection via unsanitized password parameter

Published Jan 20, 2023 · Updated Jul 9, 2026

CRLF injection in Reprise License Manager 14.2BL4 and earlier allows remote attackers to inject HTTP headers via the web interface. The View License Result function places the password parameter into an HTTP response without neutralizing carriage-return and line-feed characters. Exploitation requires user interaction; the consequence is limited to modifying HTTP response headers, with no reported disclosure or service interruption.

CVSS severity6.5
Medium
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

CRLF injection in Reprise License Manager 14.2BL4 and earlier allows remote attackers to inject HTTP headers via the web interface. The View License Result function places the password parameter into an HTTP response without neutralizing carriage-return and line-feed characters. Exploitation requires user interaction; the consequence is limited to modifying HTTP response headers, with no reported disclosure or service interruption.

The record

CVE
CVE-2021-37499
Published
Jan 20, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-74
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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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