Report · SecurityWeekAbout CVE-2025-55182Published 9 Dec 2025

React2Shell Attacks Linked to North Korean Hackers

Source SecurityWeek

Authoritative record:CVE-2025-55182· Critical 10.0

Exploited in the wild · KEV due 12 Dec 2025 · public exploit available (Metasploit, Exploit-DB) : apply the vendor's fix or mitigations to react-server-dom-webpack now.

Data as of 10 Dec 2025, 11:33 UTC

CVSS base score

10.0Critical

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

KEV deadline: 12 Dec 2025 US federal agencies must patch by this date; a sensible deadline for everyone else.

Exploitation evidence

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

Disclosed: evidence found.
CVE published 3 Dec 2025
Detectable: evidence found.
nuclei template: React Server Components - Remote Code Execution
Weaponised: evidence found.
1 Metasploit module · 1 Exploit-DB entry, 127 days after disclosure
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 2 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by Meta
2025-08-0818:21Z, 117 days before disclosure
CVE published
on cve.org
2025-12-0315:40Z, t = 0
In Threat Radar
record ingested
2025-12-0315:54Z, 14 minutes after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed · ransomware use known
2025-12-05, 2 days after disclosure
KEV remediation due
US federal deadline
2025-12-12, 9 days after disclosure
First Exploit-DB entry (opens in a new tab)
React Server 19.2.0 - Remote Code Execution
2026-04-09, 127 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (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

Affected software

Product	Affected	Fixed in
Metareact-server-dom-webpack	Affected >=19.0.0 <=19.0.0 >=19.1.0 <=19.1.1 >=19.2.0 <=19.2.0	Fixed in–
Metareact-server-dom-turbopack	Affected >=19.0.0 <=19.0.0 >=19.1.0 <=19.1.1 >=19.2.0 <=19.2.0	Fixed in–
Metareact-server-dom-parcel	Affected >=19.0.0 <=19.0.0 >=19.1.0 <=19.1.1 >=19.2.0 <=19.2.0	Fixed in–
npmreact-server-dom-parcel`pkg:npm/react-server-dom-parcel`Other threats	Affected =19.0.0 =19.1.0 =19.1.1 =19.2.0	Fixed in–
npmreact-server-dom-turbopack`pkg:npm/react-server-dom-turbopack`Other threats	Affected =19.0.0 =19.1.0 =19.1.1 =19.2.0	Fixed in–
npmreact-server-dom-webpack`pkg:npm/react-server-dom-webpack`Other threats	Affected =19.0.0 =19.1.0 =19.1.1 =19.2.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Organizations should implement a multi-layered defense strategy including: 1) Continuous monitoring for indicators of compromise related to EtherRAT and unusual network or system behavior; 2) Network segmentation to limit lateral movement in case of breach; 3) Applying security patches promptly once available for CVE-2025-55182 and related components; 4) Employing endpoint detection and response (EDR) tools capable of identifying remote access trojans; 5) Conducting threat hunting exercises focused on North Korean TTPs (tactics, techniques, and procedures); 6) Enhancing user awareness about phishing and social engineering, even if user interaction is not required, to reduce overall attack surface; 7) Restricting unnecessary remote access and enforcing strong authentication mechanisms; 8) Collaborating with national cybersecurity agencies for threat intelligence sharing and incident response support.

Description

North Korean threat actors are believed to be behind CVE-2025-55182 exploitation delivering EtherRAT. The post React2Shell Attacks Linked to North Korean Hackers appeared first on SecurityWeek .

Impact

For European organizations, the exploitation of CVE-2025-55182 poses risks including unauthorized access, data theft, espionage, and potential disruption of critical services. Sectors such as finance, energy, telecommunications, and government are particularly vulnerable due to their strategic importance and the likelihood of being targeted by North Korean actors. Compromise could lead to loss of intellectual property, exposure of sensitive personal and corporate data, and damage to operational integrity. The presence of EtherRAT enables persistent access, complicating incident response and recovery efforts. Additionally, the reputational damage and regulatory consequences under frameworks like GDPR could be significant. The threat's medium severity suggests that while immediate widespread impact may be limited, targeted attacks could have severe localized effects, especially if defenses are not adequately prepared.

Summary

The React2Shell attacks are attributed to North Korean threat actors exploiting a newly identified vulnerability, CVE-2025-55182. This vulnerability allows remote code execution, which the attackers leverage to deploy EtherRAT, a remote access trojan designed for espionage and persistent access. EtherRAT can exfiltrate sensitive data, manipulate system processes, and maintain stealthy control over compromised environments. The exploit targets specific software components, although the exact affected versions are not detailed in the provided information. Despite the absence of confirmed active exploitation in the wild, the association with a state-sponsored actor and the deployment of sophisticated malware like EtherRAT indicate a credible and evolving threat. The medium severity rating reflects the current assessment but may escalate as more details emerge or if exploitation becomes widespread. The attack vector likely involves exploiting unpatched systems remotely without requiring user interaction, increasing the risk profile. The lack of patch links suggests that fixes may not yet be publicly available, underscoring the need for vigilance and proactive defense measures.

Public tooling indexed from Metasploit Framework, Exploit-DB and ProjectDiscovery nuclei-templates. Its existence raises the odds of exploitation; it does not confirm attacks.

References

securityweek.com/react2shell-attacks-linked-to-north-korean-hackers/ (opens in a new tab)

Community reviews

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Exploitation evidence

Timeline

What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Dec 2025, 15:26 UTC

Public exploits and detection1 Metasploit module, 1 Exploit-DB entry, a Nuclei detection template

References

Community reviews

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