CVE-2020-21130Public exploitNetwork attack vector

Administrator session compromise via stored group name

Published Jun 21, 2021 · Updated Aug 4, 2024

Stored cross-site scripting in HisiPHP 2.0.8 allows remote attackers to run script in an administrator's browser through a group name. The addgroup.html endpoint accepts a POSTed name containing script markup and stores it without neutralization before the value is rendered in the administration interface. Exploitation requires an authenticated administrator's browser to submit the crafted form and process the stored group name, exposing that session to attacker-controlled script.

CVSS severityUnavailable
Unscored
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in HisiPHP 2.0.8 allows remote attackers to run script in an administrator's browser through a group name. The addgroup.html endpoint accepts a POSTed name containing script markup and stores it without neutralization before the value is rendered in the administration interface. Exploitation requires an authenticated administrator's browser to submit the crafted form and process the stored group name, exposing that session to attacker-controlled script.

The record

CVE
CVE-2020-21130
Published
Jun 21, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 21, 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

No CVSS assessment is available in this record.

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')
T1539Steal Web Session Cookie

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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