CVE-2024-51996
Symphony has an Authentication Bypass via RememberMe
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
7.5
Symphony has an Authentication Bypass via RememberMe
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.
- Record
CVE-2024-51996- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-289
- Updated
- 2026-11-02
EUVDEUVD-2024-3234
7.5
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.
- Record
EUVD-2024-3234- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cg23-qf8f-62rr
8.7
Symfony has an Authentication Bypass via RememberMe
Description
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.
Resolution
The PersistentRememberMeHandler class now ensures the submitted username is the cookie owner.
The patch for this issue is available here for branch 5.4.
Credits
We would like to thank Moritz Rauch - Pentryx AG for reporting the issue and Jérémy Derussé for providing the fix.
- Record
GHSA-cg23-qf8f-62rr- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-289
- Updated
- 2026-11-02
NVD
7.5
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.
- Record
CVE-2024-51996- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-289
- Updated
- 2026-11-02
OSV
7.5
Symphony has an Authentication Bypass via RememberMe
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.
- Record
CVE-2024-51996- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-289
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2024-51996
7.5
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.
- Record
DEBIAN-CVE-2024-51996- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-cg23-qf8f-62rr
8.7
Symfony has an Authentication Bypass via RememberMe
Description
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.
Resolution
The PersistentRememberMeHandler class now ensures the submitted username is the cookie owner.
The patch for this issue is available here for branch 5.4.
Credits
We would like to thank Moritz Rauch - Pentryx AG for reporting the issue and Jérémy Derussé for providing the fix.
- Record
GHSA-cg23-qf8f-62rr- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-287, CWE-289
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2024-51996
7.5
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.
- Record
UBUNTU-CVE-2024-51996- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUSN-7272-1 No score
symfony vulnerabilities
Soner Sayakci discovered that Symfony incorrectly handled cookie storage in the web cache. An attacker could possibly use this issue to obtain sensitive information and access unauthorized resources. (CVE-2022-24894)
Marco Squarcina discovered that Symfony incorrectly handled the storage of user session information. An attacker could possibly use this issue to perform a cross-site request forgery (CSRF) attack. (CVE-2022-24895)
Pierre Rudloff discovered that Symfony incorrectly checked HTML input. An attacker could possibly use this issue to perform cross site scripting. (CVE-2023-46734)
Vladimir Dusheyko discovered that Symfony incorrectly sanitized special input with a PHP directive in URL query strings. An attacker could possibly use this issue to expose sensitive information or cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-50340)
Oleg Andreyev, Antoine Makdessi, and Moritz Rauch discovered that Symfony incorrectly handled user authentication. An attacker could possibly use this issue to access unauthorized resources and expose sensitive information. This issue was only addressed in Ubuntu 24.04 LTS. (CVE-2024-50341, CVE-2024-51996)
Linus Karlsson and Chris Smith discovered that Symfony returned internal host information during host resolution. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 24.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-50342)
It was discovered that Symfony incorrectly parsed user input through regular expressions. An attacker could possibly use this issue to expose sensitive information. (CVE-2024-50343)
Sam Mush discovered that Symfony incorrectly parsed URIs with special characters. An attacker could possibly use this issue to perform phishing attacks. (CVE-2024-50345)
- Record
USN-7272-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
symfony/security-httpPackagist |
5.3.0 up to 5.4.47 | 5.4.47 |
symfony/security-httpPackagist |
6.0.0-BETA1 up to 6.4.15 | 6.4.15 |
symfony/security-httpPackagist |
7.0.0-BETA1 up to 7.1.8 | 7.1.8 |
symfonyDebian:12 |
before 5.4.23+dfsg-1+deb12u4, plus listed versions 5.4.23+dfsg-15.4.23+dfsg-1+deb12u15.4.23+dfsg-1+deb12u25.4.23+dfsg-1+deb12u3 |
5.4.23+dfsg-1+deb12u4 |
symfonyDebian:13 |
before 6.4.15+dfsg-1 | 6.4.15+dfsg-1 |
symfonyDebian:14 |
before 6.4.15+dfsg-1 | 6.4.15+dfsg-1 |
symfony/security-httpPackagist |
5.3.0 up to 5.4.47, plus listed versions v5.3.0v5.3.1v5.3.10v5.3.11v5.3.13 Show 41 moreShow lessv5.3.14v5.3.2v5.3.3v5.3.4v5.3.6v5.3.7v5.3.8v5.4.0v5.4.0-BETA1v5.4.0-BETA2v5.4.0-RC1v5.4.10v5.4.11v5.4.12v5.4.13v5.4.15v5.4.17v5.4.19v5.4.2v5.4.20v5.4.21v5.4.22v5.4.23v5.4.26v5.4.28v5.4.3v5.4.30v5.4.31v5.4.35v5.4.36v5.4.38v5.4.39v5.4.40v5.4.41v5.4.43v5.4.44v5.4.45v5.4.46v5.4.5v5.4.8v5.4.9 |
5.4.47 |
symfony/security-httpPackagist |
6.0.0-BETA1 up to 6.4.15, plus listed versions v6.0.0v6.0.0-BETA1v6.0.0-BETA2v6.0.0-RC1v6.0.1 Show 45 moreShow lessv6.0.10v6.0.11v6.0.12v6.0.13v6.0.14v6.0.15v6.0.17v6.0.19v6.0.2v6.0.20v6.0.3v6.0.5v6.0.7v6.0.8v6.0.9v6.1.0v6.1.0-BETA1v6.1.0-BETA2v6.1.0-RC1v6.1.1v6.1.11v6.1.12v6.1.2v6.1.3v6.1.4v6.1.5v6.1.6v6.1.7v6.1.9v6.2.0v6.2.0-BETA1v6.2.0-BETA3v6.2.0-RC1v6.2.10v6.2.11v6.2.13v6.2.2v6.2.5v6.2.6v6.2.7v6.2.8v6.3.0v6.3.0-BETA1v6.3.0-RC1v6.3.1 |
6.4.15 |
symfony/security-httpPackagist |
7.0.0-BETA1 up to 7.1.8, plus listed versions v7.0.0v7.0.0-BETA1v7.0.0-BETA3v7.0.0-RC1v7.0.0-RC2 Show 16 moreShow lessv7.0.1v7.0.3v7.0.4v7.0.7v7.0.8v7.0.9v7.1.0v7.1.0-BETA1v7.1.0-RC1v7.1.1v7.1.2v7.1.3v7.1.4v7.1.5v7.1.6v7.1.7 |
7.1.8 |
symfonyUbuntu:22.04:LTS |
All versions, plus listed versions 5.2.6+dfsg-1ubuntu75.4.4+dfsg-1ubuntu8 |
None known |
Show 6 moreShow less
| Package | Affected | Fixed |
|---|---|---|
symfonyUbuntu:Pro:24.04:LTS |
before 6.4.5+dfsg-3ubuntu3+esm1, plus listed versions 5.4.23+dfsg-1ubuntu15.4.35+dfsg-3ubuntu16.4.5+dfsg-3ubuntu26.4.5+dfsg-3ubuntu3 |
6.4.5+dfsg-3ubuntu3+esm1 |
symfonyUbuntu:25.10 |
All versions, plus listed versions 6.4.18+dfsg-1ubuntu16.4.21+dfsg-26.4.21+dfsg-2ubuntu16.4.24+dfsg-1 |
None known |
symfonyUbuntu:26.04:LTS |
All versions, plus listed versions 6.4.24+dfsg-17.4.5+dfsg-1ubuntu17.4.6+dfsg-2ubuntu17.4.7+dfsg-1ubuntu1 |
None known |
symfonyUbuntu:Pro:20.04:LTS From an advisory covering 9 CVEs |
before 4.3.8+dfsg-1ubuntu1+esm2, plus listed versions 4.3.4+dfsg-1ubuntu14.3.8+dfsg-1ubuntu14.3.8+dfsg-1ubuntu1+esm1 |
4.3.8+dfsg-1ubuntu1+esm2 |
symfonyUbuntu:Pro:22.04:LTS From an advisory covering 9 CVEs |
before 5.4.4+dfsg-1ubuntu8+esm1, plus listed versions 5.2.6+dfsg-1ubuntu75.4.4+dfsg-1ubuntu8 |
5.4.4+dfsg-1ubuntu8+esm1 |
symfonyUbuntu:Pro:24.04:LTS From an advisory covering 9 CVEs |
before 6.4.5+dfsg-3ubuntu3+esm1, plus listed versions 5.4.23+dfsg-1ubuntu15.4.35+dfsg-3ubuntu16.4.5+dfsg-3ubuntu26.4.5+dfsg-3ubuntu3 |
6.4.5+dfsg-3ubuntu3+esm1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | moften/CVE-2024-51996 | 2025-04-14 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-51996 is a high vulnerability (CVSS 7.5) in Symfony, published November 13, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.62%, the 49th percentile. Fixed in symfony/security-http 5.4.47.
References
github.com/symfony/symfony/security/advisories/GHSA-cg23-qf8f-62rr
github.com/symfony/symfony/commit/81354d392c5f0b7a52bcbd729d6f82501e94135a
github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2024-51996.yaml
github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2024-51996.yaml
symfony.com/cve-2024-51996
nvd.nist.gov/vuln/detail/CVE-2024-51996
Show 15 moreShow less
github.com/advisories/GHSA-cg23-qf8f-62rr
github.com/CVEProject/cvelistV5/tree/main/cves/2024/51xxx/CVE-2024-51996.json
security-tracker.debian.org/tracker/CVE-2024-51996
github.com/symfony/symfony
ubuntu.com/security/CVE-2024-51996
cve.org/CVERecord?id=CVE-2024-51996
ubuntu.com/security/notices/USN-7272-1
ubuntu.com/security/CVE-2022-24894
ubuntu.com/security/CVE-2022-24895
ubuntu.com/security/CVE-2023-46734
ubuntu.com/security/CVE-2024-50340
ubuntu.com/security/CVE-2024-50341
ubuntu.com/security/CVE-2024-50342
ubuntu.com/security/CVE-2024-50343
ubuntu.com/security/CVE-2024-50345
Left out here: 20 versions. The JSON record has them.