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Fencer Intel
high 7.5

CVE-2024-51996 json

Symphony has an Authentication Bypass via RememberMe

published last yr. modified 4mo ago also EUVD-2024-3234 , GHSA-cg23-qf8f-62rr

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

Symphony process is a module for the Symphony PHP framework which executes commands in sub-processes. When consuming a persisted remember-me cookie, Symfony does not check if the username persisted in the database matches the username attached with the cookie, leading to authentication bypass. This vulnerability is fixed in 5.4.47, 6.4.15, and 7.1.8.

Patch / fix

  • packagist symfony/security-http 5.4.47, 6.4.15, 7.1.8
  • symphony_php_framework symphony_process 5.4.47, 6.4.15, 7.1.8
  • symfony Debian 12 5.4.23+dfsg-1+deb12u4
  • symfony Debian 14, Debian 13 6.4.15+dfsg-1

debian advisories DEBIAN-CVE-2024-51996

  • symfony Ubuntu Pro 24.04 LTS 6.4.5+dfsg-3ubuntu3+esm1

ubuntu advisories UBUNTU-CVE-2024-51996

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist symfony/security-http
>=5.3.0, <5.4.47
>=6.0.0-BETA1, <6.4.15
>=7.0.0-BETA1, <7.1.8
5.4.47
6.4.15
7.1.8

Affected products

  • symfony symfony
  • symphony_php_framework symphony_process

Classification

Weakness
  • CWE-287 Improper Authentication
  • CWE-289 Authentication Bypass by Alternate Name

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.