CVE-2020-21130: Cross Site Scripting (XSS) vulnerability in HisiPHP 2.0.8 via the group name in addgroup.html.

This month

MEDIUM 6.1DOWNGRADE

CVE-2020-21130 is a medium-severity flaw (CVSS 6.1) affecting hisiphp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in HisiPHP 2.0.8 via the group name in addgroup.html.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-06-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hisiphp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-06-21 16:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

hisiphp hisiphp DOWNGRADE

Affected: 2.0.8

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.8

1. Check installed version

apt-cache policy hisiphp || rpm -q hisiphp || hisiphp --version

2. No fixed release: DOWNGRADE to a release before 2.0.8 (Debian / Ubuntu)

apt-cache madison hisiphp sudo apt install hisiphp=<VERSION_BEFORE_2.0.8> sudo apt-mark hold hisiphp

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hisiphp sudo dnf downgrade hisiphp-<VERSION_BEFORE_2.0.8> sudo dnf versionlock add hisiphp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-21130?

hisiphp: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-21130 being exploited?

CVE-2020-21130 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-21130 affect?

CVE-2020-21130 affects hisiphp. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) vulnerability in HisiPHP 2.0.8 via the group name in addgroup.html.

How urgent is CVE-2020-21130?

Priority 40/100. Public exploit reference

Related CVEs

CVE-2024-33445 CRITICAL 9.8 DOWNGRADE An issue in hisiphp v2.0.111 allows a remote attacker to execute arbitrary code via a crafted script to the Sy
CVE-2020-28062 HIGH 7.2 DOWNGRADE An Access Control vulnerability exists in HisiPHP 2.0.11 via special packets that are constructed in $files =
CVE-2019-1010193 MEDIUM 6.1 DOWNGRADE hisiphp 1.0.8 is affected by: Cross Site Scripting (XSS).
CVE-2018-17827 HIGH 7.2 DOWNGRADE HisiPHP 1.0.8 allows remote attackers to execute arbitrary PHP code by editing a plugin's name to contain that
CVE-2018-17826 HIGH 8.8 DOWNGRADE HisiPHP 1.0.8 allows CSRF via admin.php/admin/user/adduser.html to add an administrator account

References

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