CVE-2021-26642: When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbi

Q: How do I fix CVE-2021-26642?

xpressengine: upgrade to 3.0.14. Exact commands for each OS are on this page.

Q: Is CVE-2021-26642 being exploited?

CVE-2021-26642 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-2021-26642 affect?

CVE-2021-26642 affects xpressengine. Severity is high (CVSS 8.8). When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute a

This month

HIGH 8.8UPGRADE

CVE-2021-26642 is a high-severity flaw (CVSS 8.8) affecting xpressengine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute arbitrary code on the server where the bulletin board is running.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-01-20
Last modified	2026-06-17

Publisher (CNA): KrCERT/CC · Vendor: xpressengine

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

Am I affected?

Timeline

2023-01-20 17:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

xpressengine xpressengine UPGRADE

Affected: < 3.0.14

Fixed in: 3.0.14

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.0.14 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xpressengine

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-2021-26642?

xpressengine: upgrade to 3.0.14. Exact commands for each OS are on this page.

Is CVE-2021-26642 being exploited?

CVE-2021-26642 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-2021-26642 affect?

CVE-2021-26642 affects xpressengine. Severity is high (CVSS 8.8). When uploading an image file to a bulletin board developed with XpressEngine, a vulnerability in which an arbitrary file can be uploaded due to insufficient verification of the file. A remote attacker can use this vulnerability to execute a

How urgent is CVE-2021-26642?

Priority 48/100. High severity

Related CVEs

CVE-2011-10003 MEDIUM 5.5 UPGRADE A vulnerability was found in XpressEngine up to 1.4.4

References

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