CVE-2020-10390: OS Command Injection in export.php (vulnerable function called from include/functions-article.php) in Chadha P

This month

HIGH 7.2DOWNGRADE

CVE-2020-10390 is a high-severity flaw (CVSS 7.2) affecting phpkb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OS Command Injection in export.php (vulnerable function called from include/functions-article.php) in Chadha PHPKB Standard Multi-Language 9 allows remote attackers to achieve Code Execution by saving the code to be executed as the wkhtmltopdf path via admin/save-settings.php.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	4.3% (top 9%)
CISA exploited list	No
Weakness	CWE-78
Published	2020-03-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chadhaajay

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

Am I affected?

Timeline

2020-03-12 14:15 UTCPublished CVE record published
2026-06-17 02:47 UTCUpdated Record last modified

chadhaajay phpkb DOWNGRADE

Affected: 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 9.0 (Debian / Ubuntu)

apt-cache madison phpkb sudo apt install phpkb=<VERSION_BEFORE_9.0> sudo apt-mark hold phpkb

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

dnf --showduplicates list phpkb sudo dnf downgrade phpkb-<VERSION_BEFORE_9.0> sudo dnf versionlock add phpkb

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-2020-10390?

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

Is CVE-2020-10390 being exploited?

CVE-2020-10390 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-2020-10390 affect?

CVE-2020-10390 affects phpkb. Severity is high (CVSS 7.2). OS Command Injection in export.php (vulnerable function called from include/functions-article.php) in Chadha PHPKB Standard Multi-Language 9 allows remote attackers to achieve Code Execution by saving the code to be executed as the wkhtmlto

How urgent is CVE-2020-10390?

Priority 53/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-11579 HIGH 7.5 DOWNGRADE An issue was discovered in Chadha PHPKB 9.0 Enterprise Edition
CVE-2020-10504 MEDIUM 4.3 DOWNGRADE CSRF in admin/edit-comments.php in Chadha PHPKB Standard Multi-Language 9 allows attackers to edit a comment,
CVE-2020-10503 MEDIUM 4.3 DOWNGRADE CSRF in admin/manage-comments.php in Chadha PHPKB Standard Multi-Language 9 allows attackers to disapprove any
CVE-2020-10502 MEDIUM 4.3 DOWNGRADE CSRF in admin/manage-comments.php in Chadha PHPKB Standard Multi-Language 9 allows attackers to approve any co
CVE-2020-10501 MEDIUM 6.5 DOWNGRADE CSRF in admin/manage-departments.php in Chadha PHPKB Standard Multi-Language 9 allows attackers to edit a depa

References

← Back to latest CVEs