CVE-2021-24434: The Glass WordPress plugin through 1.3.2 does not sanitise or escape its "Glass Pages" setting before outputti

Q: How do I fix CVE-2021-24434?

glass: upgrade to newer than 1.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-24434 being exploited?

CVE-2021-24434 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-2021-24434 affect?

CVE-2021-24434 affects glass. Severity is medium (CVSS 6.1). The Glass WordPress plugin through 1.3.2 does not sanitise or escape its "Glass Pages" setting before outputting in a page, leading to a Stored Cross-Site Scripting issue. Furthermore, the plugin did not have CSRF check in place when saving

Q: How urgent is CVE-2021-24434?

Priority 35/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2021-24434 is a medium-severity flaw (CVSS 6.1) affecting glass. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Glass WordPress plugin through 1.3.2 does not sanitise or escape its "Glass Pages" setting before outputting in a page, leading to a Stored Cross-Site Scripting issue. Furthermore, the plugin did not have CSRF check in place when saving its settings, allowing the issue to be exploited via a CSRF attack.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-79, CWE-352
Published	2021-07-12
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: codeblab

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

Am I affected?

Timeline

2021-07-12 20:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

codeblab glass UPGRADE

Affected: <= 1.3.2

Fixed in: newer than 1.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade glass

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade glass

Note

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

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-2021-24434?

glass: upgrade to newer than 1.3.2. Exact commands for each OS are on this page.

Is CVE-2021-24434 being exploited?

CVE-2021-24434 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-2021-24434 affect?

CVE-2021-24434 affects glass. Severity is medium (CVSS 6.1). The Glass WordPress plugin through 1.3.2 does not sanitise or escape its "Glass Pages" setting before outputting in a page, leading to a Stored Cross-Site Scripting issue. Furthermore, the plugin did not have CSRF check in place when saving

How urgent is CVE-2021-24434?

Priority 35/100. Public exploit reference

Software pages

WordPress vulnerabilities

Related CVEs

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References

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