CVE-2020-18327: Cross Site Scripting (XSS) vulnerability exists in Alfresco Alfresco Community Edition v5.2.0 via the action p

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MEDIUM 6.1DOWNGRADE

CVE-2020-18327 is a medium-severity flaw (CVSS 6.1) affecting alfresco. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability exists in Alfresco Alfresco Community Edition v5.2.0 via the action parameter in the alfresco/s/admin/admin-nodebrowser API. Fixed in v6.2

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	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-79
Published	2022-03-04
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: alfresco

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

Am I affected?

Timeline

2022-03-04 15:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

alfresco alfresco DOWNGRADE

Affected: 5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.2 (Debian / Ubuntu)

apt-cache madison alfresco sudo apt install alfresco=<VERSION_BEFORE_5.2> sudo apt-mark hold alfresco

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

dnf --showduplicates list alfresco sudo dnf downgrade alfresco-<VERSION_BEFORE_5.2> sudo dnf versionlock add alfresco

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-2020-18327?

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

Is CVE-2020-18327 being exploited?

CVE-2020-18327 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-2020-18327 affect?

CVE-2020-18327 affects alfresco. Severity is medium (CVSS 6.1). Cross Site Scripting (XSS) vulnerability exists in Alfresco Alfresco Community Edition v5.2.0 via the action parameter in the alfresco/s/admin/admin-nodebrowser API. Fixed in v6.2

How urgent is CVE-2020-18327?

Priority 41/100. Public exploit reference

References

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