HOMEVULNERABILITIESCVE-2020-15094
HIGH

CVE-2020-15094

CWE-212Published: September 2, 2020· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-15094 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Fedora1 product(s)
fedora
sensiolabs2 product(s)
httpclientsymfony
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78
PATCHhttps://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78
ADVISORYhttps://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
ADVISORYhttps://packagist.org/packages/symfony/http-kernel
ADVISORYhttps://packagist.org/packages/symfony/symfony
ADVISORYhttps://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3r
ADVISORYhttps://packagist.org/packages/symfony/http-kernel
ADVISORYhttps://packagist.org/packages/symfony/symfony

All References (12)

→
https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78Patch · Third Party Advisory
→
https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3rThird Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC/
→
https://packagist.org/packages/symfony/http-kernelProduct · Third Party Advisory
→
https://packagist.org/packages/symfony/symfonyProduct · Third Party Advisory
→
https://github.com/symfony/symfony/commit/d9910e0b33a2e0f993abff41c6fbc86951b66d78Patch · Third Party Advisory
→
https://github.com/symfony/symfony/security/advisories/GHSA-754h-5r27-7x3rThird Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HNGUWOEETOFVH4PN3I3YO4QZHQ4AUKF3/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VAQJXAKWPMWB7OL6QPG2ZSEQZYYPU5RC/
→
https://packagist.org/packages/symfony/http-kernelProduct · Third Party Advisory
→
https://packagist.org/packages/symfony/symfonyProduct · Third Party Advisory

Quick Facts

CVE IDCVE-2020-15094
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-212
CISA KEVNo
Affected2 vendor(s)
PublishedSep 2, 2020

Related CVEs (CWE-212)

CVE-2022-1650
9.3
CVE-2020-11684
9.1
CVE-2022-30617
8.8
CVE-2026-39937
8.8
CVE-2022-2818
8.8
CVE-2019-13402
8.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-15094 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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