RentPress <= 6.6.4 Reflected Cross-Site Scripting

published 2021-09-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24776

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits: 0; none known

The RentPress WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the selections parameter found in the ~/src/rentPress/AjaxRequests.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 6.6.4.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-05-05)

Exploit prediction

0.94% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/rentpress/tags/6.6.4/src/rentPress/AjaxRequests.php#L83 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

RentPress RentPress

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

plugins.trac.wordpress.org /browser/rentpress/tags/6.6.4/src/rentPress/AjaxRequests.php#L83
exploit, third-party-advisory
wordfence.com /vulnerability-advisories/#CVE-2021-38323
third-party-advisory

Sources

CVE List CVE-2021-38323
NVD CVE-2021-38323

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