CVE-2021-36532: Race condition vulnerability discovered in portfolioCMS 1.0 allows remote attackers to run arbitrary code via

This week

HIGH 8.1REMOTEDOWNGRADE

CVE-2021-36532 is a high-severity flaw (CVSS 8.1) affecting portfoliocms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Race condition vulnerability discovered in portfolioCMS 1.0 allows remote attackers to run arbitrary code via fileExt parameter to localhost/admin/uploads.php.

Why this priority

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

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

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-362
Published	2023-02-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: portfoliocms project

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

Am I affected?

Timeline

2023-02-03 18:15 UTCPublished CVE record published
2026-06-17 03:58 UTCUpdated Record last modified

portfoliocms project portfoliocms DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison portfoliocms sudo apt install portfoliocms=<VERSION_BEFORE_1.0.0> sudo apt-mark hold portfoliocms

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

dnf --showduplicates list portfoliocms sudo dnf downgrade portfoliocms-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add portfoliocms

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-2021-36532?

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

Is CVE-2021-36532 being exploited?

CVE-2021-36532 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-2021-36532 affect?

CVE-2021-36532 affects portfoliocms. Severity is high (CVSS 8.1). Race condition vulnerability discovered in portfolioCMS 1.0 allows remote attackers to run arbitrary code via fileExt parameter to localhost/admin/uploads.php.

How urgent is CVE-2021-36532?

Priority 52/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

← Back to latest CVEs