CVE-2021-36873: Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress iQ Block Country plugin (versio

Q: How do I fix CVE-2021-36873?

iq block country: upgrade to newer than 1.2.11. Exact commands for each OS are on this page.

Q: Is CVE-2021-36873 being exploited?

CVE-2021-36873 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-2021-36873 affect?

CVE-2021-36873 affects iq block country. Severity is medium (CVSS 5.5). Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress iQ Block Country plugin (versions <= 1.2.11). Vulnerable parameter: &blockcountry_blockmessage.

Q: How urgent is CVE-2021-36873?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2021-36873 is a medium-severity flaw (CVSS 5.5) affecting iq block country. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress iQ Block Country plugin (versions <= 1.2.11). Vulnerable parameter: &blockcountry_blockmessage.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-09-23
Last modified	2026-06-17

Publisher (CNA): Patchstack · Vendor: webence

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

Am I affected?

Timeline

2021-09-23 17:15 UTCPublished CVE record published
2026-06-17 03:59 UTCUpdated Record last modified

webence iq block country UPGRADE

Affected: <= 1.2.11

Fixed in: newer than 1.2.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy iq-block-country || rpm -q iq-block-country || iq-block-country --version

2. UPGRADE to newer than 1.2.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade iq-block-country

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade iq-block-country

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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: WordPress iQ Block Country <=1.2.11 - 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-2021-36873?

iq block country: upgrade to newer than 1.2.11. Exact commands for each OS are on this page.

Is CVE-2021-36873 being exploited?

CVE-2021-36873 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-2021-36873 affect?

CVE-2021-36873 affects iq block country. Severity is medium (CVSS 5.5). Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress iQ Block Country plugin (versions <= 1.2.11). Vulnerable parameter: &blockcountry_blockmessage.

How urgent is CVE-2021-36873?

Priority 36/100. No elevated risk signals yet.

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2022-41155 MEDIUM 5.3 UPGRADE Block BYPASS vulnerability in iQ Block Country plugin <= 1.2.18 on WordPress.
CVE-2022-1762 HIGH 7.5 UPGRADE The iQ Block Country WordPress plugin before 1.2.20 does not properly checks HTTP headers in order to validate
CVE-2022-0246 MEDIUM 4.9 UPGRADE The settings of the iQ Block Country WordPress plugin before 1.2.13 can be exported or imported using its back

References

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