CVE-2021-3980: elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor

Q: How do I fix CVE-2021-3980?

elgg: upgrade to 3.3.23. Exact commands for each OS are on this page.

Q: Is CVE-2021-3980 being exploited?

CVE-2021-3980 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-3980 affect?

CVE-2021-3980 affects elgg. Severity is high (CVSS 7.5). elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor

Q: How urgent is CVE-2021-3980?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-3980 is a high-severity flaw (CVSS 7.5) affecting elgg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-359
Published	2021-12-03
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: elgg

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

Am I affected?

Timeline

2021-12-03 15:15 UTCPublished CVE record published
2026-06-17 04:06 UTCUpdated Record last modified

elgg elgg UPGRADE

Affected: < 3.3.23

Fixed in: 3.3.23

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.3.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade elgg

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade elgg

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2021-3980?

elgg: upgrade to 3.3.23. Exact commands for each OS are on this page.

Is CVE-2021-3980 being exploited?

CVE-2021-3980 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-2021-3980 affect?

CVE-2021-3980 affects elgg. Severity is high (CVSS 7.5). elgg is vulnerable to Exposure of Private Personal Information to an Unauthorized Actor

How urgent is CVE-2021-3980?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-4072 MEDIUM 5.4 UPGRADE elgg is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2021-3964 MEDIUM 5.9 UPGRADE elgg is vulnerable to Authorization Bypass Through User-Controlled Key

References

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