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CVE-2020-26282

26
FAUCET Score

CVE-2020-26282 describes a critical Server-Side Template Injection vulnerability in BrowserUp Proxy versions prior to 2.1.2. This flaw allows unauthenticated attackers to inject arbitrary Java EL expressions, leading to unauthenticated Remote Code Execution (RCE). With a CVSS score of 10.0, this vulnerability is easily exploitable over the network with no user interaction, granting full control over the affected system. Despite its critical severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.2CPE matchmatch criteria
cpe:2.3:a:browserup:browserup_proxy:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

10.0CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.63%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0463 is in the 84th percentile among its peer group of 36,862 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.browserup:browserup-proxyFixed in: 2.1.2

Vendor Advisories (1)

mavenGHSA-wmfg-55f9-j8hqhigh

Server-Side Template Injection

Dec 24, 2020

References

github.com / browserup/browserup-proxy/commit/4b38e7a3e20917e5c3329d0d4e9590bed9d578ab
PatchThird Party Advisory
github.com / browserup/browserup-proxy/releases/tag/v2.1.2
Third Party Advisory
github.com / browserup/browserup-proxy/security/advisories/GHSA-wmfg-55f9-j8hq
Third Party Advisory
securitylab.github.com / research/bean-validation-RCE
ExploitThird Party Advisory