7.8

CVE-2021-23191: htmldoc_project htmldoc NULL Pointer Dereference

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2021-23191DEBIAN-CVE-2021-23191
Published 02-03-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-23191 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in htmldoc_project htmldoc. EPSS estimates a 1.10% chance of exploitation in the next 30 days, higher than 65.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
41/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
1.10%
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. 02-03-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may result in denial of service.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.10%

Chance of exploitation in the next 30 days

Percentile

65%

Versus all other CVEs

30-day change

0.00 pp

From 1.10% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.10%

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