CVE-2020-26282Template Injection in BrowserUp Proxy
- 10.0CriticalCVSS base score
- 4.8%Exploitation in 30 daysEPSS · top 7.9% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
BrowserUp Proxy allows you to manipulate HTTP requests and responses, capture HTTP content, and export performance data as a HAR file. BrowserUp Proxy works well as a standalone proxy server, but it is especially useful when embedded in Selenium tests. A Server-Side Template Injection was identified in BrowserUp Proxy enabling attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE) vulnerability. This has been patched in version 2.1.2.
Timeline
ID reserved
By GitHub_M
- 3 months later
· 3 months later
Published
- 4 years later
· 4 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 |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N |
| NVDNVD · Modified | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.8% · top 7.9% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.
Affected products
- affected < 2.1.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavencom.browserup:browserup-proxyGHSA-wmfg-55f9-j8hq (opens in a new tab)
References
References4
- https://github.com/browserup/browserup-proxy/security/advisories/GHSA-wmfg-55f9-j8hq (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://securitylab.github.com/research/bean-validation-RCE (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/browserup/browserup-proxy/releases/tag/v2.1.2 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/browserup/browserup-proxy/commit/4b38e7a3e20917e5c3329d0d4e9590bed9d578ab (opens in a new tab)x_refsource_MISCx_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-2020-1509 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-wmfg-55f9-j8hq (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-2020-26282)Record last updated .