CVE-2021-25959Network attack vector

Victim-browser script execution via reflected reset parameters

Published Sep 29, 2021 · Updated Sep 16, 2024

Reflected XSS in openCRX 4.0.0 through 5.1.0 allows remote attackers to execute JavaScript in a user's browser via password-reset parameters. PasswordResetConfirm.jsp writes the id, provider, and segment request values into page headings after checking only that they are nonempty, allowing supplied markup to reach the response. Exploitation is unauthenticated but requires a user to open a crafted reset URL; the script then runs in that user's openCRX origin.

CVSS severity6.1
Medium
EPSS probability0.86%
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 openCRX 4.0.0 through 5.1.0 allows remote attackers to execute JavaScript in a user's browser via password-reset parameters. PasswordResetConfirm.jsp writes the id, provider, and segment request values into page headings after checking only that they are nonempty, allowing supplied markup to reach the response. Exploitation is unauthenticated but requires a user to open a crafted reset URL; the script then runs in that user's openCRX origin.

The record

CVE
CVE-2021-25959
Published
Sep 29, 2021
Updated
Sep 16, 2024
Vendor
openCRX
Product
openCRX Core Config
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 29, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=4.0.0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

openCRX · openCRX Core Configversion=4.0.0 <*

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1MendCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1NVDCVSS: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 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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

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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