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CVE-2020-15094

RCE in Symfony

HIGH
8.8
CVSS Score
Published: September 2, 2020 at 05:35 PM UTC
Updated: June 17, 2026 at 02:56 AM UTC
4 products affected across 3 vendorsFedoraSymfonyHttpclient

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Severity
HIGH8.8
Exploit prediction
EPSS 3%

Description

In Symfony before versions 4.4.13 and 5.1.5, the CachingHttpClient class from the HttpClient Symfony component relies on the HttpCache class to handle requests. HttpCache uses internal headers like X-Body-Eval and X-Body-File to control the restoration of cached responses. The class was initially written with surrogate caching and ESI support in mind (all HTTP calls come from a trusted backend in that scenario). But when used by CachingHttpClient and if an attacker can control the response for a request being made by the CachingHttpClient, remote code execution is possible. This has been fixed in versions 4.4.13 and 5.1.5.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3233
Httpclient· Sensiolabs
95%
4.4.0 ≤ v < 4.4.135.1.0 ≤ v < 5.1.5
Affected range stops below 4.4.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.1.5, so it looks safe — our inference, not a vendor statement
Symfony· Sensiolabsdrupal
95%
4.4.0 ≤ v < 4.4.135.1.0 ≤ v < 5.1.5
Affected range stops below 4.4.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.1.5, so it looks safe — our inference, not a vendor statement
Symfony· Symfonycomposer
60%
v < 4.4.13v < 5.1.5
Affected range stops below 4.4.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.1.5, so it looks safe — our inference, not a vendor statement

References (6)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC/
x_refsource_MISCProductThird Party Advisory
Source: [email protected]
https://packagist.org/packages/symfony/http-kernel
x_refsource_MISCProductThird Party Advisory
Source: [email protected]
https://packagist.org/packages/symfony/symfony

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-212

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