CVE-2021-43091
CVE-2021-43091 is a high-severity vulnerability in Yeswiki with a CVSS 3.x base score of 7.5. 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-89.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-89
- Affected product: Yeswiki
- Published:
- Last modified:
Description
An SQL Injection vlnerability exits in Yeswiki doryphore 20211012 via the email parameter in the registration form.
Frequently asked questions
- What is CVE-2021-43091?
- An SQL Injection vlnerability exits in Yeswiki doryphore 20211012 via the email parameter in the registration form.
- How severe is CVE-2021-43091?
- CVE-2021-43091 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2021-43091 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-43091?
- CVE-2021-43091 affects Yeswiki. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-43091?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-43091 published?
- CVE-2021-43091 was published on 2022-03-25 and last updated on 2026-06-17.
References
- https://github.com/yeswiki/yeswiki/commit/c9785f9a92744c3475f9676a0d8f95de24750094
- https://huntr.dev/bounties/07f245a7-ee9f-4b55-a0cc-13d5cb1be6e0/
Affected products (1)
- cpe:2.3:a:yeswiki:yeswiki:4.1.0:*:*:*:*:*:*:*
More vulnerabilities in Yeswiki
- CVE-2025-46348 — Critical (CVSS 10.0): YesWiki is a wiki system written in PHP. Prior to version 4.5.4, the request to commence a site backup can be performed…
- CVE-2024-51478 — Critical (CVSS 9.9): YesWiki is a wiki system written in PHP. Prior to 4.4.5, the use of a weak cryptographic algorithm and a hard-coded…
- CVE-2025-46347 — Critical (CVSS 9.8): YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki vulnerable to remote code execution. An…
- CVE-2018-1000641 — Critical (CVSS 9.8): YesWiki version <= cercopitheque beta 1 contains a PHP Object Injection vulnerability in Unserialising user entered…
- CVE-2025-31131 — High (CVSS 8.6): YesWiki is a wiki system written in PHP. The squelette parameter is vulnerable to path traversal attacks, enabling read…
- CVE-2025-46349 — High (CVSS 7.6): YesWiki is a wiki system written in PHP. Prior to version 4.5.4, YesWiki is vulnerable to reflected XSS in the file…
Other CWE-89 (SQL Injection) vulnerabilities
- CVE-2026-54350 — Critical (CVSS 10.0): Budibase is an open-source low-code platform. Prior to 3.39.12, an unauthenticated visitor of any published Budibase…
- CVE-2026-8054 — Critical (CVSS 10.0): Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in the Publish Audit API endpoints…
- CVE-2026-42287 — Critical (CVSS 10.0): Emlog is an open source website building system. Prior to version 2.6.11, direct SQL injection in article creation and…
- CVE-2026-3325 — Critical (CVSS 10.0): SQL injection (SQLi) in MegaCMS v12.0.0, specifically in the “id_territorio” parameter of the…
- CVE-2025-10878 — Critical (CVSS 10.0): A SQL injection vulnerability exists in the login functionality of Fikir Odalari AdminPando 1.0.1 before 2026-01-26.…
- CVE-2025-57792 — Critical (CVSS 10.0): Explorance Blue versions prior to 8.14.9 contain a SQL injection vulnerability caused by insufficient validation of…