CVE-2020-29477: Invision Community 4.5.4 is affected by cross-site scripting (XSS) in the Field Name field

Routine

MEDIUM 4.8DOWNGRADE

CVE-2020-29477 is a medium-severity flaw (CVSS 4.8) affecting community. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Invision Community 4.5.4 is affected by cross-site scripting (XSS) in the Field Name field. This vulnerability can allow an attacker to inject the XSS payload in Field Name and each time any user will open that, the XSS triggers and the attacker can able to steal the cookie according to the crafted payload.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-12-30
Last modified	2026-07-09

Publisher (CNA): MITRE · Vendor: invisioncommunity

Last updated 2026-07-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-30 15:15 UTCPublished CVE record published
2026-07-09 01:16 UTCUpdated Record last modified

invisioncommunity community DOWNGRADE

Affected: 4.5.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.5.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.5.4 (Debian / Ubuntu)

apt-cache madison community sudo apt install community=<VERSION_BEFORE_4.5.4> sudo apt-mark hold community

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

dnf --showduplicates list community sudo dnf downgrade community-<VERSION_BEFORE_4.5.4> sudo dnf versionlock add community

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Invision Community 4.5.4 - 'Field Name' Stored Cross-Site Scripting

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-2020-29477?

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

Is CVE-2020-29477 being exploited?

CVE-2020-29477 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-2020-29477 affect?

CVE-2020-29477 affects community. Severity is medium (CVSS 4.8). Invision Community 4.5.4 is affected by cross-site scripting (XSS) in the Field Name field. This vulnerability can allow an attacker to inject the XSS payload in Field Name and each time any user will open that, the XSS triggers and the att

How urgent is CVE-2020-29477?

Priority 38/100. Public exploit reference

Related CVEs

CVE-2012-1903 MEDIUM 5.4 DOWNGRADE XSS in Telligent Community 5.6.583.20496 via a flash file and related to the allowScriptAccess parameter.

References

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