CVE-2023-5725

Name: CVE-2023-5725
Creator: NVD / NIST
Published: 2023-10-25T18:17:44.16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.91%

Last modified Jun 17, 2026

CVE-2023-5725 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.. EPSS estimates a 0.91% chance of exploitation in the next 30 days.

Description

A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.91%

55.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 119.0
Mozilla	Firefox Esr	< 115.4
Mozilla	Thunderbird	< 115.4.1
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1845739Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5535Mailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5538Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1845739Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00037.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00042.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5535Mailing List, Third Party Advisory
https://www.debian.org/security/2023/dsa-5538Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2023-45/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-46/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2023-47/Vendor Advisory

Timeline

Published: Oct 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5725?

How severe is CVE-2023-5725?

CVE-2023-5725 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.91% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5725?

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-2023-5725?

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

Scan your code now

Source: NVD / NIST