CVE-2021-24156: Stored Cross-Site Scripting vulnerabilities in Testimonial Rotator 3.0.3 allow low privileged users (Contribut

Routine

MEDIUM 5.4DOWNGRADE

CVE-2021-24156 is a medium-severity flaw (CVSS 5.4) affecting testimonial rotator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stored Cross-Site Scripting vulnerabilities in Testimonial Rotator 3.0.3 allow low privileged users (Contributor) to inject arbitrary JavaScript code or HTML without approval. This could lead to privilege escalation

Why this priority

Public exploit reference

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

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-04-05
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: testimonial rotator project

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

Am I affected?

Timeline

2021-04-05 19:15 UTCPublished CVE record published
2026-06-17 03:39 UTCUpdated Record last modified

testimonial rotator project testimonial rotator DOWNGRADE

Affected: 3.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.3

1. Check installed version

apt-cache policy testimonial-rotator || rpm -q testimonial-rotator || testimonial-rotator --version

2. No fixed release: DOWNGRADE to a release before 3.0.3 (Debian / Ubuntu)

apt-cache madison testimonial-rotator sudo apt install testimonial-rotator=<VERSION_BEFORE_3.0.3> sudo apt-mark hold testimonial-rotator

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

dnf --showduplicates list testimonial-rotator sudo dnf downgrade testimonial-rotator-<VERSION_BEFORE_3.0.3> sudo dnf versionlock add testimonial-rotator

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-2021-24156?

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

Is CVE-2021-24156 being exploited?

CVE-2021-24156 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-2021-24156 affect?

CVE-2021-24156 affects testimonial rotator. Severity is medium (CVSS 5.4). Stored Cross-Site Scripting vulnerabilities in Testimonial Rotator 3.0.3 allow low privileged users (Contributor) to inject arbitrary JavaScript code or HTML without approval. This could lead to privilege escalation

How urgent is CVE-2021-24156?

Priority 37/100. Public exploit reference

Related CVEs

CVE-2020-26672 MEDIUM 5.4 UPGRADE Testimonial Rotator Wordpress Plugin 3.0.2 is affected by Cross Site Scripting (XSS) in /wp-admin/post.php

References

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