7.5

CVE-2021-33580: apache software foundation apache roller Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighModified
Published 18-08-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-33580 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in apache software foundation apache roller. EPSS estimates a 3.30% chance of exploitation in the next 30 days, higher than 88.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
3.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-08-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

User controlled `request.getHeader("Referer")`, `request.getRequestURL()` and `request.getQueryString()` are used to build and run a regex expression. The attacker doesn't have to use a browser and may send a specially crafted Referer header programmatically. Since the attacker controls the string and the regex pattern he may cause a ReDoS by regex catastrophic backtracking on the server side. This problem has been fixed in Roller 6.0.2.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

3.30%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

0.00 pp

From 3.30% on 18-09-2026

18-09-202618-10-2026
EPSS score
3.30%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
Apache software foundation1 product

2 vendors · 2 products

References

2 links