Is CVE-2023-34089 in the CISA KEV catalog?

No. CVE-2023-34089 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-34089?

CVE-2023-34089 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2023-34089?

CVE-2023-34089 has an EPSS score of 0.58% (43th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-34089?

Upgrade decidim to 0.27.3 or later.

CVE & CISA-KEV Catalog

CVE-2023-34089

HIGH

8.1

CVSS v3

NVD

Description

Decidim is a participatory democracy framework, written in Ruby on Rails, originally developed for the Barcelona City government online and offline participation website. The processes filter feature is susceptible to Cross-site scripting. This allows a remote attacker to execute JavaScript code in the context of a currently logged-in user. An attacker could use this vulnerability to make other users endorse or support proposals they have no intention of supporting or endorsing. The problem was patched in version 0.27.3 and 0.26.7.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

decidimNVD

Affected:>= 0.27.0, < 0.27.3Fixed in:0.27.3CVE-2023-34089derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploit Intelligence

0.58%probability of exploitation in 30 days

43rdpercentile

Moderate risk: more likely to be exploited than 43% of all known CVEs.

References

Third-Party Advisory1

github.com

Release Notes2

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.