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CVE-2023-46733

22
FAUCET Score

CVE-2023-46733 is a session fixation vulnerability affecting Symfony versions 5.4.21-5.4.30 and 6.2.7-6.3.7. The vulnerability arises because the SessionStrategyListener fails to regenerate the session ID after a successful login when the user identifier remains the same but the authentication token type changes, potentially allowing an attacker to fixate a user's session. With a CVSS score of 6.5 (Medium), this vulnerability has a network attack vector, low attack complexity, and a high impact on integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.4.21, < 5.4.31CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 6.2.7, < 6.3.8CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.69%
Probability of exploitation in next 30 days
EPSS Percentile
49.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0069 is in the 59th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 5.4.31
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 6.3.8
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 5.4.31
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 6.3.8
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-m2wj-r6g3-fxfxmedium

Symfony possible session fixation vulnerability

Nov 12, 2023

References

github.com / symfony/symfony/commit/7467bd7e3f888b333102bc664b5e02ef1e7f88b9
Patch
github.com / symfony/symfony/commit/dc356499d5ceb86f7cf2b4c7f032eca97061ed74
Patch
github.com / symfony/symfony/security/advisories/GHSA-m2wj-r6g3-fxfx
PatchVendor Advisory