CVE-2021-32855: b3log vditor Cross-site Scripting
CVSS: 6.1v3.1MediumModified
AliasesGHSA-vfmp-9999-6wqj
Published 20-02-2023Last modified 10-03-2025
Vulnerability summary
CVE-2021-32855 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in b3log vditor. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)EPSS score
0.58%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 20-02-2023PublishedVulnerability first disclosed.
- 10-03-2025Last modifiedVulnerability information updated.
Description
Vditor is a browser-side Markdown editor. Versions prior to 3.8.7 are vulnerable to copy-paste cross-site scripting (XSS). For this particular type of XSS, the victim needs to be fooled into copying a malicious payload into the text editor. Version 3.8.7 contains a patch for this issue.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 6.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NSourcesAll 3 agree
- OSV · NpmEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.58%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
0.00 pp
From 0.58% on 18-09-2026
18-09-202618-10-2026
EPSS score0.58%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundGhsl 2021 1006 Vditor
Maturity: poc
Weaknesses
CWE · root causeAffected systems
B3log1 product
- vditor< 3.8.7
Npm1 product
- vditor< 3.8.7 | ≥ 3.8.7, < 3.8.7
2 vendors · 2 products
References
6 links- github.com/Vanessa219/vditor/commit/1b2382d7f8a4ee509d9245db4450d926a0b24146WEBPatchThird Party Advisory
- github.com/Vanessa219/vditorPACKAGE