5.3

CVE-2023-5722: mozilla firefox Observable Discrepancy

CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2023-5722CGA-58pg-x34q-v7gpCGA-9gp9-vw8r-c3jr
Published 24-10-2023Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2023-5722 is a medium (CVSS 5.3) Observable Discrepancy vulnerability in mozilla firefox. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.7% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.64%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 7
OPENSUSE-SU-2024:13385-1OPENSUSE-SU-2024:14572-1SUSE-SU-2023:4212-1SUSE-SU-2023:4213-1SUSE-SU-2023:4214-1USN-6456-1

Timeline

  1. 24-10-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

Using iterative requests an attacker was able to learn the size of an opaque response, as well as the contents of a server-supplied Vary header. This vulnerability affects Firefox < 119.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.64% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.64%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu7 products
  • firefox< 119.0+build2-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard1 product
  • firefox-esr< 119.0-r0
Mozilla1 product
  • firefox≥ unspecified, < 119 | < 119.0

3 vendors · 9 products

References

7 links