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CVE-2020-26297

21
FAUCET Score

CVE-2020-26297 is a cross-site scripting (XSS) vulnerability affecting mdBook versions prior to 0.4.5, a utility for creating online books from Markdown files. An attacker could execute arbitrary JavaScript code in a user's browser by crafting a malicious search query or a link to the search page with a prefilled malicious query. Rated Medium (CVSS 6.1), this vulnerability requires user interaction (UI:R) and has low impact on confidentiality and integrity (C:L/I:L). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.1.4, < 0.4.5CPE matchmatch criteria
cpe:2.3:a:rust-lang:mdbook:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 79th percentile among its peer group of 26,236 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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
rustpatch availablevia ghsa
Product: mdBookFixed in: 0.4.5

Vendor Advisories (1)

rustGHSA-gx5w-rrhp-f436high

XSS in mdBook

Aug 25, 2021

References

crates.io / crates/mdbook
ProductThird Party Advisory
github.com / rust-lang/mdBook/blob/master/CHANGELOG.md
Release NotesThird Party Advisory
github.com / rust-lang/mdBook/commit/32abeef088e98327ca0dfccdad92e84afa9d2e9b
PatchThird Party Advisory
github.com / rust-lang/mdBook/security/advisories/GHSA-gx5w-rrhp-f436
MitigationThird Party Advisory
groups.google.com / g/rustlang-security-announcements/c/3-sO6of29O0
Mailing ListThird Party Advisory