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CVE-2018-19790

22
FAUCET Score

CVE-2018-19790 describes an open redirect vulnerability in multiple versions of the Symfony framework, affecting Debian and Fedora distributions. Attackers can exploit this by manipulating the _failure_path input field in login forms with backslashes, bypassing redirection restrictions to redirect users to arbitrary domains after successful login. This is a medium-severity vulnerability (CVSS 6.1) with low attack complexity and requires user interaction, potentially leading to information disclosure or phishing. While no active exploitation, public exploit code, or significant community discussion has been observed, organizations using affected Symfony versions should apply available patches.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.7.0, < 2.7.50CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 2.8.0, < 2.8.49CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 3.0.0, < 3.4.20CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.15CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*
>= 4.1.0, < 4.1.9CPE matchmatch criteria
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.49%
Probability of exploitation in next 30 days
EPSS Percentile
71.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0149 is in the 84th percentile among its peer group of 26,236 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (17)

composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 2.7.50
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 2.8.49
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 3.4.20
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 4.0.15
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 4.1.9
composerpatch availablevia ghsa
Product: symfony/security-httpFixed in: 4.2.1
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 2.7.50
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 2.8.49
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 3.4.19
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 4.0.15
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 4.1.9
composerpatch availablevia ghsa
Product: symfony/securityFixed in: 4.2.1
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 2.7.50
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 2.8.49
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 3.4.20
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 4.0.15
composerpatch availablevia ghsa
Product: symfony/symfonyFixed in: 4.1.9

Vendor Advisories (1)

composerGHSA-89r2-5g34-2g47medium

Symfony Open Redirect

May 14, 2022

References

lists.debian.org / debian-lts-announce/2019/03/msg00009.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/4TD3E7FZIXLVFG3SMFJPDEKPZ26TJOW7
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/JZMRJ7VTHCY5AZK24G4QGX36RLUDTDKE
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/OA4WVFN5FYPIXAPLWZI6N425JHHDSWAZ
seclists.org / bugtraq/2019/May/21
symfony.com / blog/cve-2018-19790-open-redirect-vulnerability-when-using-security-http
PatchVendor Advisory
debian.org / security/2019/dsa-4441
securityfocus.com / bid/106249
Third Party AdvisoryVDB Entry