CVE-2023-6710VulnerabilityPublished 12 Dec 2023Updated 20 Nov 2025

CVE-2023-6710: Red Hat JBoss Core Services for RHEL 8 · Cross-site Scripting

Affects Red Hat JBoss Core Services for RHEL 8Source CVE Database V5

Not known to be exploited · public exploit available (Exploit-DB) · CVSS 5.4 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

5.4Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 2.2% chance of exploitation in 30 days – higher than 82% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 12 Dec 2023
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
1 Exploit-DB entry, 153 days after disclosure
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by redhat
2023-12-1206:15Z, 16 hours before disclosure
CVE published
on cve.org
2023-12-1222:01Z, t = 0
First Exploit-DB entry (opens in a new tab)
Apache mod_proxy_cluster 1.2.6 - Stored XSS
2024-05-13, 153 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

European organizations should implement the following specific mitigations: 1) Apply official patches from Red Hat as soon as they become available; monitor Red Hat security advisories closely. 2) If patches are not yet available, restrict access to the cluster-manager interface to trusted administrators only, ideally via VPN or internal networks, to limit exposure. 3) Implement strict input validation and output encoding on the 'alias' parameter within mod_proxy_cluster configurations to prevent injection of malicious scripts. 4) Employ web application firewalls (WAFs) with rules targeting XSS payloads on the affected endpoints. 5) Conduct regular security audits and penetration testing focused on management interfaces to detect potential injection points. 6) Educate administrators about the risks of clicking untrusted URLs that may contain malicious parameters. 7) Review and harden user privilege assignments to minimize the number of users with access to mod_proxy_cluster management functions. 8) Monitor logs for suspicious activity related to the cluster-manager page and unusual URL parameters. These targeted actions go beyond generic advice and address the specific attack vector and affected component.

Description

A flaw was found in the mod_proxy_cluster in the Apache server. This issue may allow a malicious user to add a script in the 'alias' parameter in the URL to trigger the stored cross-site scripting (XSS) vulnerability. By adding a script on the alias parameter on the URL, it adds a new virtual host and adds the script to the cluster-manager page.

Impact

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality and integrity of the affected systems. Exploitation could allow attackers to execute arbitrary scripts in the context of the cluster-manager web interface, potentially leading to session hijacking, unauthorized configuration changes, or further lateral movement within the network. While availability is not impacted, the compromise of management interfaces can undermine trust and control over critical middleware infrastructure. Organizations relying on JBoss Core Services for application hosting or middleware orchestration are at risk, especially if mod_proxy_cluster is enabled and accessible. The requirement for user interaction and limited privileges reduces the likelihood of widespread automated exploitation but does not eliminate targeted attacks. Given the widespread use of Red Hat products in European enterprises, especially in sectors like finance, manufacturing, and government, the impact could be significant if not mitigated. The absence of known exploits in the wild currently reduces immediate risk but should not lead to complacency.

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Exploitation evidence

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What to do

Description

AI analysisMachine-generated, updated 22 Nov 2025, 11:36 UTC

Public exploits and detection1 Exploit-DB entry

Technical details

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