CVE-2018-14773
An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through…
- 6.5MediumCVSS base score
- 57.6%Exploitation in 30 daysEPSS · top 0.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An issue was discovered in Http Foundation in Symfony 2.7.0 through 2.7.48, 2.8.0 through 2.8.43, 3.3.0 through 3.3.17, 3.4.0 through 3.4.13, 4.0.0 through 4.0.13, and 4.1.0 through 4.1.2. It arises from support for a (legacy) IIS header that lets users override the path in the request URL via the X-Original-URL or X-Rewrite-URL HTTP request header. These headers are designed for IIS support, but it's not verified that the server is in fact running IIS, which means anybody who can send these requests to an application can trigger this. This affects \Symfony\Component\HttpFoundation\Request::prepareRequestUri() where X-Original-URL and X_REWRITE_URL are both used. The fix drops support for these methods so that they cannot be used as attack vectors such as web cache poisoning.
Timeline
ID reserved
By mitre
- 3 days later
· 3 days later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 57.6% · top 0.9% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
n/a
- affected n/a
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Packagistsymfony/http-foundationGHSA-8wgj-6wx8-h5hq (opens in a new tab)
- Packagistsymfony/symfonyGHSA-8wgj-6wx8-h5hq (opens in a new tab)
References
References8
- 104943 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://www.drupal.org/SA-CORE-2018-005 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [debian-lts-announce] 20190310 [SECURITY] [DLA 1707-1] symfony security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://symfony.com/blog/cve-2018-14773-remove-support-for-legacy-and-risky-http-headers (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/symfony/symfony/commit/e447e8b92148ddb3d1956b96638600ec95e08f6b (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1041405 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- DSA-4441 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 20190510 [SECURITY] [DSA 4441-1] symfony security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-3252 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-8wgj-6wx8-h5hq (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-14773)Record last updated .