CVE-2023-5388

Name: CVE-2023-5388
Creator: NVD / NIST
Published: 2024-03-19T12:15:07.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2023-5388 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

Description

NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow an attacker to recover the private data. This vulnerability affects Firefox < 124, Firefox ESR < 115.9, and Thunderbird < 115.9.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.82%

52.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.9.0
Mozilla	Firefox	< 124.0
Mozilla	Thunderbird	< 115.9.0
Debian	Debian Linux	10.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1780432Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00028.htmlMailing List, Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2024-12/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-13/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-14/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1780432Issue Tracking, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00010.html
https://lists.debian.org/debian-lts-announce/2024/03/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/03/msg00028.htmlMailing List, Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2024-12/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-13/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-14/Vendor Advisory

Timeline

Published: Mar 19, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-5388?

How severe is CVE-2023-5388?

CVE-2023-5388 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5388?

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-2023-5388?

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

Scan your code now

Source: NVD / NIST