CVE-2021-32703: fedoraproject fedora
Vulnerability summary
CVE-2021-32703 is a medium (CVSS 5.3) vulnerability in fedoraproject fedora. EPSS estimates a 1.51% chance of exploitation in the next 30 days, higher than 74% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 12-07-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the shareinfo endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
1.51%
Chance of exploitation in the next 30 days
Percentile
74%
Versus all other CVEs
30-day change
0.00 pp
From 1.51% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-799Improper Control of Interaction FrequencyThe product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.
- CWE-307Improper Restriction of Excessive Authentication AttemptsThe product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
Affected systems
Nextcloud2 products
- nextcloud_server< 19.0.13 | ≥ 20.0.0, < 20.0.11 | ≥ 21.0.0, < 21.0.3
- security-advisories< 19.0.13 | ≥ 20.0.0, < 20.0.11 | ≥ 21.0.0, < 21.0.3
Fedoraproject1 product
- fedoraEOL33 | 34
2 vendors · 3 products
References
6 links- github.com/nextcloud/security-advisories/security/advisories/GHSA-375p-cxxq-gc9pX Refsource CONFIRMThird Party Advisory