CVE-2020-35313

CRITICALNVD 9.89.8—Elevated

9.8

A server-side request forgery (SSRF) vulnerability in the addCustomThemePluginRepository function in index.php in WonderCMS 3.1.3 allows remote attackers to execute arbitrary code via a crafted URL to the theme/plugin installer.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 91.3%
KEV: Not listed

Published

April 20, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/robiso/wondercms
cve@mitrehttps://packetstormsecurity.com/files/160310/WonderCMS-3.1.3-Code-Execution-Server-Side-Request-Forgery.html
cve@mitrehttps://zetc0de.github.io/post/authenticated-rce-ssrf-wondercms/
af854a3a-2127-422b-91ae-364da2661108https://github.com/robiso/wondercms
af854a3a-2127-422b-91ae-364da2661108https://packetstormsecurity.com/files/160310/WonderCMS-3.1.3-Code-Execution-Server-Side-Request-Forgery.html
af854a3a-2127-422b-91ae-364da2661108https://zetc0de.github.io/post/authenticated-rce-ssrf-wondercms/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-918Server-Side Request Forgery (SSRF)

Data Freshness Timeline

(refreshed 10× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 18:06 UTCEG score recompute
2026-05-26 18:06 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 21:42 UTCOSV refresh

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-49154
First seen Dec 2, 2020
WonderCMS 3.1.3 - Authenticated SSRF to Remote Remote Code Execution
Open source ↗

Frequently asked(5)

What is CVE-2020-35313?

CVE-2020-35313 is a critical vulnerability published on April 20, 2021. A server-side request forgery (SSRF) vulnerability in the addCustomThemePluginRepository function in index.php in WonderCMS 3.1.3 allows remote attackers to execute arbitrary code via a crafted URL to the theme/plugin installer.

When was CVE-2020-35313 disclosed?

CVE-2020-35313 was first published in the National Vulnerability Database on April 20, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-35313 actively exploited?

CVE-2020-35313 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-35313?

CVE-2020-35313 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-35313?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-35313, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2020-35313

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-35313?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)