How severe is CVE-2021-23654?

CVE-2021-23654 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-23654 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23654?

CVE-2021-23654 affects Html-to-csv Project Html-to-csv. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23654?

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

When was CVE-2021-23654 published?

CVE-2021-23654 was published on 2021-11-26 and last updated on 2026-06-17.

CVE-2021-23654

CVE-2021-23654 is a medium-severity vulnerability in Html-to-csv Project Html-to-csv with a CVSS 3.x base score of 5.6. 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-1236.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
CVSS v2: 7.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1236
Affected product: Html-to-csv Project Html-to-csv
Published: 2021-11-26
Last modified: 2026-06-17

Description

This affects all versions of package html-to-csv. When there is a formula embedded in a HTML page, it gets accepted without any validation and the same would be pushed while converting it into a CSV file. Through this a malicious actor can embed or generate a malicious link or execute commands via CSV files.

Frequently asked questions

What is CVE-2021-23654?: This affects all versions of package html-to-csv. When there is a formula embedded in a HTML page, it gets accepted without any validation and the same would be pushed while converting it into a CSV file. Through this a malicious actor can embed or generate a malicious link or execute commands via CSV files.
How severe is CVE-2021-23654?: CVE-2021-23654 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-23654 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23654?: CVE-2021-23654 affects Html-to-csv Project Html-to-csv. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23654?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23654 published?: CVE-2021-23654 was published on 2021-11-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:html-to-csv_project:html-to-csv:*:*:*:*:*:python:*:*

Other CWE-1236 (Improper Neutralization of Formula Elements in a CSV File) vulnerabilities

CVE-2026-31049 — Critical (CVSS 9.8): An issue in Hostbill v.2025-11-24 and 2025-12-01 allows a remote attacker to execute arbitrary code and escalate…
CVE-2020-36962 — Critical (CVSS 9.8): Tendenci 12.3.1 contains a CSV formula injection vulnerability in the contact form message field that allows attackers…
CVE-2021-47901 — Critical (CVSS 9.8): Dirsearch 0.4.1 contains a CSV injection vulnerability when using the --csv-report flag that allows attackers to inject…
CVE-2020-36941 — Critical (CVSS 9.8): Knockpy 4.1.1 contains a CSV injection vulnerability that allows attackers to inject malicious formulas into CSV…
CVE-2025-56267 — Critical (CVSS 9.8): A CSV injection vulnerability in the /id_profiles endpoint of Avigilon ACM v7.10.0.20 allows attackers to execute…
CVE-2023-47295 — Critical (CVSS 9.8): A CSV injection vulnerability in NCR Terminal Handler v1.5.1 allows attackers to execute arbitrary commands via…

Browse all CWE-1236 (Improper Neutralization of Formula Elements in a CSV File) vulnerabilities →