CVE-2020-21729: JEECMS x1.1 contains a stored cross-site scripting (XSS) vulnerability in the component of /member-vipcenter.h

Routine

MEDIUM 5.4DOWNGRADE

CVE-2020-21729 is a medium-severity flaw (CVSS 5.4) affecting jeecms x. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JEECMS x1.1 contains a stored cross-site scripting (XSS) vulnerability in the component of /member-vipcenter.htm, which allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-10-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jeecms

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

Am I affected?

Timeline

2021-10-07 22:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

jeecms jeecms x DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy jeecms-x || rpm -q jeecms-x || jeecms-x --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison jeecms-x sudo apt install jeecms-x=<VERSION_BEFORE_1.1> sudo apt-mark hold jeecms-x

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

dnf --showduplicates list jeecms-x sudo dnf downgrade jeecms-x-<VERSION_BEFORE_1.1> sudo dnf versionlock add jeecms-x

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-2020-21729?

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

Is CVE-2020-21729 being exploited?

CVE-2020-21729 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-2020-21729 affect?

CVE-2020-21729 affects jeecms x. Severity is medium (CVSS 5.4). JEECMS x1.1 contains a stored cross-site scripting (XSS) vulnerability in the component of /member-vipcenter.htm, which allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

How urgent is CVE-2020-21729?

Priority 36/100. Public exploit reference

References

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