CVE-2025-25427

Name: CVE-2025-25427
Creator: NVD / NIST
Published: 2025-04-18T01:15:32.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.56%

Last modified Jun 17, 2026

CVE-2025-25427 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A stored cross-site scripting (XSS) vulnerability in the upnp.htm page of the web Interface in TP-Link WR841N v14/v14.6/v14.8 <= Build 241230 Rel. 50788n allows remote attackers to inject arbitrary JavaScript code via the port mapping description. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

Description

A stored cross-site scripting (XSS) vulnerability in the upnp.htm page of the web Interface in TP-Link WR841N v14/v14.6/v14.8 <= Build 241230 Rel. 50788n allows remote attackers to inject arbitrary JavaScript code via the port mapping description. This leads to an execution of the JavaScript payload when the upnp page is loaded.

Metrics

CVSS 3.1

5.4/10

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

CVSS 4.0

8.6/10

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.56%

42.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Tp-Link	Wr841n Firmware	<= 241230

References

https://github.com/slin99/2025-25427Exploit, Third Party Advisory
https://www.tp-link.com/us/support/download/tl-wr841n/#FirmwareProduct
https://www.tp-link.com/us/support/faq/4415/Vendor Advisory
https://github.com/slin99/2025-25427/blob/master/readme.mdExploit, Third Party Advisory

Timeline

Published: Apr 18, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-25427?

How severe is CVE-2025-25427?

CVE-2025-25427 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.

How do I fix CVE-2025-25427?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-25427?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST