Gutenslider < 5.2.0 - Contributor+ Stored XSS

published 2021-09-20 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11552

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits: 0; none known

The WordPress Slider Block Gutenslider plugin before 5.2.0 does not escape the minWidth attribute of a Gutenburg block, which could allow users with a role as low as contributor to perform Cross-Site Scripting attacks

Patch / fix

fixed in 1

gutenslider gutenslider 5.2.0

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

wpscan.com https://wpscan.com/vulnerability/e61dd498-5d0e-45ce-b660-a36c576f8d78 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

Unknown WordPress Slider Block Gutenslider

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

wpscan.com /vulnerability/e61dd498-5d0e-45ce-b660-a36c576f8d78
exploit, third-party-advisory

Sources

CVE List CVE-2021-24640
NVD CVE-2021-24640

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary