CVE-2020-20982: Cross Site Scripting (XSS) vulnerability in shadoweb wdja v1.5.1, allows attackers to execute arbitrary code a

This month

CRITICAL 9.6DOWNGRADE

CVE-2020-20982 is a critical-severity flaw (CVSS 9.6) affecting wdja cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross Site Scripting (XSS) vulnerability in shadoweb wdja v1.5.1, allows attackers to execute arbitrary code and gain escalated privileges, via the backurl parameter to /php/passport/index.php.

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited

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

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	6.2% (top 7%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-11-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: wdja

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

Am I affected?

Timeline

2021-11-03 17:15 UTCPublished CVE record published
2026-06-17 03:03 UTCUpdated Record last modified

wdja wdja cms DOWNGRADE

Affected: 1.5.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.1

1. Check installed version

apt-cache policy wdja-cms || rpm -q wdja-cms || wdja-cms --version

2. No fixed release: DOWNGRADE to a release before 1.5.1 (Debian / Ubuntu)

apt-cache madison wdja-cms sudo apt install wdja-cms=<VERSION_BEFORE_1.5.1> sudo apt-mark hold wdja-cms

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

dnf --showduplicates list wdja-cms sudo dnf downgrade wdja-cms-<VERSION_BEFORE_1.5.1> sudo dnf versionlock add wdja-cms

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.

Nuclei scan template: shadoweb wdja v1.5.1 - 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-2020-20982?

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

Is CVE-2020-20982 being exploited?

CVE-2020-20982 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-2020-20982 affect?

CVE-2020-20982 affects wdja cms. Severity is critical (CVSS 9.6). Cross Site Scripting (XSS) vulnerability in shadoweb wdja v1.5.1, allows attackers to execute arbitrary code and gain escalated privileges, via the backurl parameter to /php/passport/index.php.

How urgent is CVE-2020-20982?

Priority 57/100. Critical severity; EPSS top 7%: very likely to be exploited

Software pages

PHP vulnerabilities

Related CVEs

CVE-2020-23631 MEDIUM 6.1 DOWNGRADE Cross-site request forgery (CSRF) in admin/global/manage.php in WDJA CMS 1.5 allows remote attackers to conduc
CVE-2020-21658 MEDIUM 6.5 DOWNGRADE A Cross-Site Request Forgery (CSRF) in WDJA CMS v1.5.2 allows attackers to arbitrarily add administrator accou
CVE-2020-21648 CRITICAL 9.1 DOWNGRADE WDJA CMS v1.5.2 contains an arbitrary file deletion vulnerability in the component admin/cache/manage.php.

References

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