How severe is CVE-2021-32855?

CVE-2021-32855 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-32855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32855?

CVE-2021-32855 affects B3log Vditor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32855?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-32855 published?

CVE-2021-32855 was published on 2023-02-21 and last updated on 2026-06-17.

CVE-2021-32855

CVE-2021-32855 is a medium-severity vulnerability in B3log Vditor with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: B3log Vditor
Published: 2023-02-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-32855?: 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.
How severe is CVE-2021-32855?: CVE-2021-32855 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-32855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32855?: CVE-2021-32855 affects B3log Vditor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-32855 published?: CVE-2021-32855 was published on 2023-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:b3log:vditor:*:*:*:*:*:*:*:*

More vulnerabilities in B3log Vditor

CVE-2024-34449 — Medium (CVSS 6.1): Vditor 3.10.3 allows XSS via an attribute of an A element. NOTE: the vendor indicates that a user is supposed to…
CVE-2024-39150 — Medium (CVSS 5.9): vditor v.3.9.8 and before is vulnerable to Arbitrary file read via a crafted data packet.
CVE-2022-0350 — Medium (CVSS 5.4): Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 3.8.13.
CVE-2022-0341 — Medium (CVSS 5.4): Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 3.8.12.
CVE-2021-4103 — Medium (CVSS 5.4): Cross-site Scripting (XSS) - Stored in GitHub repository vanessa219/vditor prior to 1.0.34.

All CVEs affecting B3log Vditor →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →