9.8

CVE-2021-23158: htmldoc_project htmldoc Double Free

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2021-23158DEBIAN-CVE-2021-23158
Published 16-03-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-23158 is a critical (CVSS 9.8) Double Free vulnerability in htmldoc_project htmldoc. EPSS estimates a 2.44% chance of exploitation in the next 30 days, higher than 84.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.44%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 4 · Related 1
DLA-2700-1DSA-4928-1MGASA-2021-0332USN-7189-1

Timeline

  1. 16-03-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in htmldoc in v1.9.12. Double-free in function pspdf_export(),in ps-pdf.cxx may result in a write-what-where condition, allowing an attacker to execute arbitrary code and denial of service.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.44%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

0.00 pp

From 2.44% on 22-09-2026

22-09-202622-10-2026
EPSS score
2.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Htmldoc

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • htmldoc< 1.9.11-4
Htmldoc_project1 product
Ubuntu1 product
  • htmldoc< 1.8.27-8ubuntu1+esm3 | < 1.8.27-8ubuntu1.1+esm2 | < 1.9.2-1ubuntu0.2+esm1 | < 1.9.7-1ubuntu0.3+esm1

3 vendors · 3 products

References

7 links